Commercial video games are typically developed as proprietary closed source software products, with the source code treated as a trade secret (unlike open-source video games). When there is no more expected revenue, these games enter the end-of-life as a product with no support or availability for the game's users and community, becoming abandoned.
In several of the cases listed here, the game's developers released the source code expressly to prevent their work from becoming abandonware. Such source code is often released under varying (free and non-free, commercial and non-commercial) software licenses to the games' communities or the public; artwork and data are often released under a different license than the source code, as the copyright situation is different or more complicated. The source code may be pushed by the developers to public repositories (e.g. SourceForge or GitHub), or given to selected game community members, or sold with the game, or become available by other means. The game may be written in an interpreted language such as BASIC or Python, and distributed as raw source code without being compiled; early software was often distributed in text form, as in the book BASIC Computer Games. In some cases when a game's source code is not available by other means, the game's community "reconstructs" source code from compiled binary files through time-demanding reverse engineering techniques. Source code availability in whatever form allows the games' communities to study how the game works, make modifications, and provide technical support themselves when the official support has ended, e.g. with unofficial patches to fix bugs or source ports to make the game compatible with new platforms.
Games with source code available on releaseEdit
|Title||First release||Genre||Engine license||Content license||Original developer||Additional information|
|A Dark Room||2013||Online text-based role-playing game||Mozilla Public License||Mozilla Public License||Doublespeak Games||In July 2013 the source code of the game was put on GitHub under MPL 2.0. Became commercially successful after the source code release.|
|Akalabeth: World of Doom||1979||Role-playing video game||Public domain software||Freeware||Richard Garriott||Richard Garriott distributed the Applesoft BASIC written game originally as source code. Also later Origin Systems offered the source code on their FTP servers.|
|Barkley 2||2021 (Cancelled)||ARPG||Proprietary/CC BY-NC 4.0
|CC BY-NC 4.0||Tales of Game's Studios||Source code released to the public under no license on June 11, 2021 upon the cancellation of the game.|
|Barotrauma||2017||Role-playing video game||restrictive (only mods)||Proprietary||Undertow Games / Joonas "Regalis" Rikkonen||The game was released in 2017 commercially on Steam by independent developer Undertow Games (Joonas "Regalis" Rikkonen). Source code was released on 4 June 2017 on GitHub under a restrictive mods allowing license. His previous game, SCP – Containment Breach, is also available as free and open-source software under CC BY-SA license.|
|Beneath a Steel Sky Remastered||2009||Adventure game||GPLv2+||Proprietary||Revolution Software||Source code released under the GPL.|
|Bomb Alley||1983||Turn-based strategy||Proprietary||Proprietary||Strategic Simulations / Gary Grigsby||The game used the same engine used by Grigsby's previous Guadalcanal Campaign, which was coded and distributed as uncompiled Applesoft BASIC.|
|Diamond Trust of London||2012||TBS||Public domain software||Public domain||Jason Rohrer||Following a Kickstarter crowdfunding campaign Diamond Trust of London was developed by Jason Rohrer and published by indiePub. On August 28, 2012, it was released for the Nintendo DS. The game has been placed in the public domain, hosted on SourceForge, like most of Rohrer's games.|
|DONKEY.BAS||1981||Racing game||Proprietary||Proprietary||Bill Gates, Neil Konzen||Was written by Microsoft co-founder Bill Gates and Neil Konzen in 1981 and was included with early versions of the PC DOS operating system for the original IBM PC. Similar early BASIC games which were distributed as source code are GORILLA.BAS and NIBBLES.BAS.|
|Doom Classic||2009||First-person shooter||GPLv2+||Proprietary||id Software||Source code of the iOS port released in November 2009 as it is based on the PrBoom source port.|
|ELIZA (DOCTOR)||1966||Chatbot / Rogerian psychotherapist simulator||Public domain software / CC0||Public domain||Joseph Weizenbaum||ELIZA is an influential video game predecessor written at the MIT Artificial Intelligence Laboratory by Joseph Weizenbaum between 1964 and 1966. Weizenbaum's original MAD-SLIP implementation was re-written in Lisp by Bernie Cosell. A BASIC version appeared in Creative Computing in 1977, written in 1973 by Jeff Shrager. This version, which was ported to many of the earliest personal computers, appears to have been subsequently translated into many other versions in many other languages. On May 28, 2021, the original MAD-Slip source code for ELIZA was discovered and released under the CC0 free-software license with permission of Weizenbaum's estate.|
|Frogatto & Friends||2010||platformer||Zlib license / CC-BY 3.0||Proprietary||Lost Pixel||The game was developed open-source on GitHub with an own open-source game engine by several The Battle for Wesnoth developers and released in July 2010 for several platforms. The game was for purchase on the MacOS' app store, iPhone App Store and BlackBerry App World as the game assets were kept proprietary.|
|HyperRogue||2011||Roguelike||GPLv2+||Proprietary||Zeno Rogue||Released in 2011 on GitHub as open-source non-Euclidean roguelike, it was commercialized in 2015 on Steam and other distributors.|
|Ion Fury||2019||First-person shooter||GNU General Public License||Proprietary||Voidpoint||Ion Fury is based on the EDuke32 source port of Duke Nukem 3D, which is under the GNU General Public License. It is possible to compile Ion Fury by downloading the latest version of EDuke32 and compile it with the flag |
|Jagged Alliance 2 Wildfire (now JA2-Stracciatella)||2004||Tactical role-playing game||Own license||Proprietary||iDeal Games||Source code was bundled and released with JA2: Wildfire 2004. The JA: Unfinished Business source code became later available too.|
|One Hour One Life||2018||Multiplayer survival game||Public domain software||Public domain||Jason Rohrer||Released February 2018 and exclusively sold via the developer's webpage. Like the games before, public domain software and hosted on GitHub.|
|Pitman||1985||Puzzle game||Proprietary||Proprietary||Yutaka Isokawa||Originally created in 1985 on a MZ-700 home computer by Yutaka Isokawa. The BASIC listing was published in the August 1985 issue of the magazine "Oh!MZ Publications". In 1990 the game was commercially converted for the Game Boy. In 2011 the game community restored an faithful as possible version from the available variants.|
|Pixel Dungeon||2014||roguelike||GPLv3+||Freeware/Commercial||watabou||Available commercially on Steam, while the Android release source code and original itch.io release are available for free.|
|Receiver||2012||FPS / stealth game||own non-commercial conditions||Proprietary||Wolfire games||The source code of the game is available since 2012 on GitHub under non-commercial conditions.|
|Santa Paravia en Fiumaccio||1978||turn-based strategy||Public domain software||Public domain||George Blank||The game by George Blank first appeared in the December 1978 issue of SoftSide magazine as BASIC listing. It was published for sale on tape cassette as a computer game by Instant Software for the Radio Shack TRS-80, the Apple II, Texas Instruments TI-99/4A, and the Commodore PET. It has been translated into many programming languages, such as ANSI C, and has been ported to the Palm Pilot.|
|Softporn Adventure||1981||Text adventure||Proprietary||Freeware||Chuck Benton / On-Line Systems||A comedic, adult-oriented text adventure game produced for the Apple II in 1981. Softporn Adventure was originally written and released for the Apple II as Applesoft BASIC source code in 1981 by programmer Chuck Benton. The game was released by On-Line Systems and became later the base for Leisure Suit Larry 1. The PC version was also released later as freeware by Al Lowe.|
|Strife: Veteran Edition (Strife remaster)||2014||FPS||GPLv2+||Proprietary||Samuel Villarreal / Night Dive Studios||In December 2014, Night Dive Studios coordinated the re-release of the 1996 first-person shooter role playing hybrid game Strife as Strife: Veteran Edition, after acquiring rights to the game. Because the game's source code had been lost, a derivative of the Chocolate Doom subproject Chocolate Strife was used as the game's engine, with its original programmers being contracted to do additional coding for the re-release. The source code of Strife: Veteran Edition has been made available under GPLv3 on GitHub by Samuel Villarreal and Night Dive Studios on December 12, 2014. While this was the first source code opened for a Night Dive Studios Studio's game, it was announced more will follow, for instance for System Shock 1.|
|Quadrilateral Cowboy||2016||Puzzle video game||GPLv3+||Proprietary||Blendo Games||Game source released on August 8, 2016, as it is based on the iodoom3 source port.|
|Telengard||1982||Dungeon crawler, role-playing, roguelike||Proprietary||Proprietary||Avalon Hill / Daniel Lawrence||As the game's BASIC source code ("DSKTEL.BAS") was available early on, ports and remaster exist therefore by the community.|
|The Castle Doctrine||2014||MMO||Public domain software||Public domain||Jason Rohrer||The Castle Doctrine is developed by Jason Rohrer in a public SourceForge repository and is like most of his creative works in the public domain. The Castle Doctrine was developed as an early access game and is now sold on Steam for $14.99.|
|The Oregon Trail||1975||Role-playing video game||Public domain (?)||Public domain (?)||Don Rawitsch / MECC||First publicly released in 1975 in BASIC, as was the updated 1978 version which was more widely published in Creative Computing, May/June 1978. Source rediscovered in 2011.|
|The Prisoner||1980||adventure game||Proprietary||Proprietary||Edu-Ware / David Mullich||Developed in BASIC for the Apple II the source code was available with the release. Source code is hosted on GitHub.|
|Thirty Flights of Loving||2012||Adventure game||GPLv2+||Proprietary||Blendo Games||Game source released in August 2012 as it is based on the KMQuake II source port.|
|Vulture for Nethack||1987||rogue-like||NetHack General Public License||Freeware / Commercial||NetHack community / Jaakko Peltonen / Clive Crous||Falcon's Eye was developed by Jaakko Peltonen as graphical version of NetHack. After 2001 development had ended, Clive Crous continued Falcon's Eye as Vulture's Eye. While still being Free and open-source software the game is commercialized via the author's website and Desura for $2.99. In October 2013 the game was put into the Steam Greenlight process and successfully released on Steam in January 2016.|
|Wargroove||2019||Turn-based tactics||Apache-2.0||Proprietary||Chucklefish||Halley, the custom engine made for Wargroove, has been available on GitHub to the public at least since 2018.|
|Wolfenstein 3D Classic Platinum||2009||First-person shooter||GPLv2+||Proprietary||id Software||Source code of the iOS port released in March 2009 as it is based on the Wolfenstein 3-D Redux source port.|
|Wrath: Aeon of Ruin||2019 (early access)||First-person shooter||GPLv2+||Proprietary||KillPixel||Being released in November 2019 as early access game, based on the DarkPlaces engine, the game's source code was also released on GitHub.|
Games with later released source codeEdit
List of commercial video games with later released source code
This list has been split for improved performance.
Games with available source codeEdit
The table below with available source code resulted not from official releases by companies or IP holders but from unclear release situations, like lost & found and leaks of unclear legality (e.g. by an individual developer on end-of-product-life) or undeleted content.
|Title||Original release||Source code found or leaked||Genre||Original developer||Additional information|
|360: Three Sixty||1999||2020||Racing||Smart Dog||The PlayStation source code can be found in a dummy file on the disc.|
|Actua Soccer 96||1996||1996||sports game||Gremlin Interactive||A demo CD that shipped with a game magazine accidentally contained the C++ source code of the game.|
|Adventure in Time||1981||2016||Adventure game||Phoenix Software||In November 2016 the source code for the Atari 8-bit and Apple II versions of Adventure in Time and Birth of the Phoenix were released by Kevin Savetz, along with partial code of Queen of Phobos for Apple II.|
|Age of Pirates 2: City of Abandoned Ships||2009||2021||Role-playing game||Akella||Source code of Storm Engine released on GitHub under GPLv3 in a 2021 and support Sea Dogs: To Each His Own and Age of Pirates 2: City of Abandoned Ships.|
|Airforce Delta||2000||2020||Flight simulator||Climax Studios||Source code of the Game Boy Color version was leaked on 4chan in May 2020.|
|Aliens versus Predator 2||2001||2002||FPS||Monolith Productions||Source code released on the Monolith Productions FTP server in 2002, then quickly taken down.|
|Asteroids||1979||1996||Arcade||Atari||Source code of Asteroids in the Atari 7800 version was released in physical form by Atari Sunnyvale on their closure 1996. Together with Ms. Pac-Man, Dig Dug, Robotron: 2084 and eight further games reconstructed by the Atari-Museum and published later. Ports for modern FPGAs were made later.|
|Art of Fighting||1992||2014||Fighting game||SNK||The source code was found on an NEC PC-9821 used for developing Neo Geo titles in 2014.|
|Aztec||1982||2019||Action-adventure||Datamost||In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.|
|Battle Konchuuden||1999||2019||Role-playing game||Jaleco Entertainment||A zip file was found within the retail games dummy data, which included the full PlayStation 1 source code to the game.|
|Beatmania 5th Mix||1999||2000||Music video game||Konami||With the 2000 Japanese PSX game Beatmania Best Hits there was mistakenly included the source code for the 1999 game Beatmania 5th Mix.|
|The Bilestoad||1982||2019||Action-adventure||Datamost||In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.|
|Blood||1997||2000/2010||FPS||Monolith Productions||In 2000, partial source code of an alpha version was leaked. In 2010, the complete alpha source code was leaked. Using the code as reference, a reverse engineered build of the final version was created by Alexander Makarov for source ports around 2017.|
|Blood & Magic||1996||2021||Real-time strategy||Tachyon Studios||Source code was uploaded to archive.org in 2021.|
|B.O.B. / Space Funky B.O.B.||1993||2008||Side-scrolling game||Electronic Arts||On September 12, 2008, the source code of the SNES version became available as it was found on an eBay-bought hard drive.|
|Buck Rogers: Planet of Zoom||1983||2018||Rail shooter||Sega||On May 17, 2018, Kevin Savetz uploaded scans of the complete source code of the Atari 8-bit conversion of Buck Rogers: Planet of Zoom donated by Charlie Kulas.|
|California Watersports||2001||2020||Sports||Theyer GFX||The PlayStation source code was released in 2020 with the permission of developer Mark Theyer.|
|Captain Comic||1988||2012||Platformer||Michael Denio||In September 2012 the source code of the NES version was offered on eBay for $439.|
|Chicken Run||2000||2011||Stealth game||Blitz Games||In May 2011 the Sega Dreamcast source code became available, found by a collector on a Dreamcast Dev Kit's harddrive.|
|Chill||1998||2020||sports game||Silicon Dreams||A zip file was found within the retail game's dummy data, which included the full PlayStation 1 source code to the game.|
|Columns||1990||2010||Puzzle game||Sega||Game Gear version source code was found in 2006 and released in 2010. |
|Counter-Strike: Global Offensive||2012||2020||first-person shooter||Valve||A 2017 version of the game's source code was leaked on 4chan in 2020.|
|Cyberpunk 2077||2020||2021||Role-playing game||CD Projekt Red||Source code obtained in a 2021 ransomware attack against CD Projekt Red, and was sold at auction for one million US dollars.|
|Dark Chambers||1988||2008||Dungeon crawl||Atari Corporation||The source code for the Atari 2600 version of Dark Chambers was uploaded to AtariAge by Curt Vendel on February 9, 2008.|
|Dark Engine (Thief, Thief II, System Shock 2)||1993||2009/2010||Stealth game||Looking Glass Studios||In 2009, a complete copy of the Dark Engine source code was discovered in the possession of an ex-Looking Glass Studios employee who was at the time continuing his work for Eidos Interactive. In late April 2010, a user on the Dreamcast Talk forum disassembled the contents of a Dreamcast development kit he had purchased. Later, significant updates for the Dark Engine-based games were published.|
|Dark Reign 2||2000||2011||RTS||Pandemic Studios||Released by a former developer of Pandemic Studios under LGPL to prevent that the game become unsupported Abandonware. Legal status unclear.|
|Defender||1981||2021||Scrolling shooter||Williams Electronics||On January 7, 2021, Jason Scott uploaded to GitHub the source code for the original arcade version of Defender.|
|Desert Falcon||1987||2008||Scrolling shooter||General Computer Corporation||The source code for the Atari 2600 version of Desert Falcon was uploaded to AtariAge by Curt Vendel on February 9, 2008.|
|Devil May Cry 2||2003||2020||Hack and slash||Capcom||Source code was obtained in a 2020 ransomware attack against Capcom.|
|Donkey Kong||1981||2008||Platformer||Nintendo||In August 2008 the source code of Donkey Kong in Atari 800 6502 assembly was published at the AtariAge forum by Curt Vendel (the Atari Flashback designer), and was discussed there by the original developer, Landon Dyer.|
|Double Dragon II: The Revenge||1989||2013||Beat em up||Technōs Japan||In 2013 the Internet Archive put the undeleted assembly sources (DRGNSRC.LZH) of the DOS version for download.|
|Empire||1977||197?||turn-based wargame||Walter Bright||At some point, someone broke through the security systems at Caltech, and took a copy of the source code for the FORTRAN/PDP-10 version of the game. This code was continually modified, being passed around from person to person and ported to other system e.g. to VAX/VMS OS.|
|Eve Online||2003||2011||Space strategy MMO||CCP Games||On 20 May 2011 someone released the EVE Online source code on a GitHub repository. After the source code was online four days, CCP issued a DMCA take-down request which was followed by GitHub.|
|Extreme-G 3||2001||2015||Racing game||Acclaim Cheltenham||The source code of the PS2 game came into hands of a community member by unknown means around 2015.|
|Eye of the Beholder II: The Legend of Darkmoon||1991||2021||Role-playing game||Westwood Associates||The source code was released on archive.org in 2021.|
|Falcon 4.0||1998||2000||Combat flight simulator||MicroProse||A 2000 source code leak by a former developer allowed unofficial community development, including upgrades, improved graphics, and bug fixes. In 2013 the source code of one of the community development branches was released to a GitHub repository under a questionable BSD license.|
|Fall Guys: Ultimate Knockout||2020||2021||Battle royale game||Mediatonic||Intermediate C++ source code (transpiled from C# with Unity's IL2CPP compiler) accidentally included with a 2021 update.|
|Fate||2005||2015||Action RPG||WildTangent||Inadvertently made available when Fate and its sequel Fate: Undiscovered Realms were offered through a May 2015 Humble Bundle. The download link provided to purchasers for the DRM-Free copy lead to an apparently current dump of the source code. This was available for several days before it was corrected.|
|FIFA 97||1996||1996||sport video game||Electronic Arts||Around 1996 Electronic Arts accidentally put the game's source code on a demo disc.|
|Forsaken||1998||2007||6DOF shooter||Probe Entertainment||In 2007, nine years after the first release, the game itself and its source code were considered abandoned and became available to the public. The game's community took up the game and kept updating and porting the game via a GitHub repository under a GPL license.|
|GunZ: The Duel||2005||2011||Third-person shooter||MAIET Entertainment||In 2011 the source code of GunZ 1.5 became available online.|
|Gwent: The Witcher Card Game||2018||2021||Collectible card game||CD Projekt Red||Source code obtained in a 2021 ransomware attack against CD Projekt Red, and was leaked to 4chan on February 9, 2021.|
|Hägar the Horrible||1992||2021||Platform||Kingsoft||Source code for the Commodore 64 version was uploaded to archive.org in 2021.|
|Half-Life 2 (alpha version only)||2004||2003||FPS||Valve||An alpha version of Half-Life 2's source code was leaked in 2003, a year before the game's release.|
|Harry Potter and the Chamber of Secrets (PC)||2002||2020||Action-adventure||KnowWonder||Source code from a prototype version was leaked in 2020.|
|Home Alone 2: Lost in New York||1992||2016||Action game||Imagineering||Game source released of the NES game in 2016 by Frank Cifaldi after finding it on an old hard drive.|
|Hulk||2003||2021||Action||Radical Entertainment||Source code released on 4chan on August 22, 2021.|
|Joust||1982||2021||Action game||Williams Electronics||On January 7, 2021, Jason Scott uploaded to GitHub the source code for the original arcade version of Joust.|
|Kelly Slater's Pro Surfer||2002||2021||Sports game||Treyarch||Source code found in a ZIP file in a prototype version of the PlayStation 2 version.|
|Killer7||2005||2016||Action-adventure game||Grasshopper Manufacture||Sources and assets from the GameCube game were found in October 2016 on an open webserver.|
|Lineage II||2003||2003||MMORPG||NCSOFT||In 2003 a Chinese Hacker acquired the Lineage II source code, and sold it to someone who set up alternative servers. Shutdown by FBI in 2007.|
|Mad Planets||1983||2021||Multidirectional shooter||Gottlieb||Uploaded to the Internet Archive by Jason Scott on 20 May 2021.|
|Metal Arms: Glitch in the System||2003||2019||Third-person shooter||Sierra Entertainment||Uploaded to archive.org in 2019.|
|Metin 2||2004||?||MMORPG||Ymir Entertainment||The source of the leak is unknown for certain, it is said that an ex employee at Ymir Entertainment leaked the source code for revenge after he was fired.|
|Microsoft Entertainment Pack||1996||2004||Casual game||Microsoft||In the copies of Windows NT 4.0 and Windows 2000 source code which leaked back in 2004, there are 32-bit versions of Cruel, Golf, Pegged, Reversi, Snake (Rattler Race), Taipei and TicTactics.|
|The Misadventures of Tron Bonne||1999||2020||Action-adventure||Capcom||Source code was obtained in a 2020 ransomware attack against Capcom.|
|Monopoly||2000||2018||Board||Artech Studios||The source code for the Microsoft Windows version of the 2000 video game Monopoly was leaked in August 2018.|
|Mortal Kombat Trilogy||1996||2018||Fighting||Midway Games||Game source code for the Nintendo 64 version was leaked anonymously on 4chan, alongside the PC, PS1, and Arcade source of Mortal Kombat 3.|
|Monsters, Inc.||2001||2019||Platform||Kodiak Interactive||Source code and artwork for the PlayStation 2 version was uploaded to archive.org in 2019.|
|Mr Nutz 2||1994||2008||Platformer||Ocean Software||Amiga game, source code prototype associated with Peter Thierolf.|
|Mr. Robot and His Robot Factory||1983||2019||Platform||Datamost||In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.|
|The Muppets on the Go!||1996||2017||Educational||Climax Studios||Source code found on a backup disc, among art assets and more.|
|NBA Jam||1993||2021||Sports video game||Midway Games||On April 6, 2021, Jason Scott uploaded to GitHub the source code for the original arcade version of NBA Jam. In addition, he also uploaded the source code for 2 on 2 Open Ice Challenge, Cruis'n USA, Narc, NBA Hangtime, NBA Jam: Tournament Edition, Revolution X, Sinistar, Smash TV, Total Carnage, Trog, and WWF WrestleMania: The Arcade Game.|
|NBA Jam Extreme||1996||2017||Sports game||Sculptured Software||In February 2017 the source code was discovered on an archival CD liquidated by Acclaim Entertainment during their bankruptcy sale. It was subsequently sold on eBay for $500.|
|Nickelodeon Party Blast||2002||2020||Party game||Data Design Interactive||Found a developer's HDD in September 2020, along with many other Data Design Interactive games.|
|Ninja Hattori-kun||1986||2019||Platformer||Hudson Soft||Uploaded to GitHub on December 24, 2019.|
|Various Nintendo games||1990-2017||2020-2021||Various||Various||Throughout 2020, the source code for several games by Nintendo (as well as console firmware) was leaked by anonymous users on 4chan. These include the first four (and seventh) generations of the Pokémon series and the firmware for the Nintendo 64, GameCube, and 3DS. For more information, please see 2020 Nintendo data leak.|
|Oni (video game)||2001||2021||Third person shooter||Bungie||On April 29, 2021, an unknown source uploaded the source code to the Internet Archive.|
|Outlaw Golf||2002||2021||Golf||Hypnotix||On January 2, 2021, Forest of Illusion uploaded a .zip file recovered from a hard drive of Data Design Interactive containing the entire source code for the Windows, Xbox and GameCube versions of the game.|
|Pac-Man||1982||2019||Maze||Roklan Corp.||In August 2019 the source code for the Atari 8-bit version was released by Kevin Savetz.|
|Pesterminator: The Western Exterminator||1990||2019||side-scrolling||Color Dreams||In November 2019 the NES source code was uploaded to the Internet Archive.|
|Pinball Fantasies||1994||2020||Pinball||FrontLine Design||On December 20, 2020, Jason Scott uploaded to GitHub the source code for the DOS port of Pinball Fantasies.|
|Pole Position||1983||2009||Racing||General Computer Corporation||On May 20, 2009, Curt Vendel released the source code of the Atari 2600 conversion of Pole Position.|
|Postal III||2011||2020||First person shooter||Running with Scissors||Leaked onto 4chan in June 2020, and contains pre-release Half-Life 2 and Team Fortress 2 content.|
|Ragnarok Online 2||2007||2014||MMORPG||Gravity||Posted on a forum found through unknown means.|
|Raid 2020||1989||2019||Side-scrolling action game||Color Dreams||Source code was found on a floppy disk and uploaded to archive.org in 2019.|
|Re-Volt||1999||200?||Racing game||Acclaim Studios London||Members of the fan-base have acquired the source code of the game around 2004, which was leaked from an anonymous developer who worked on the Xbox Live port. The game community works since then on fan patches and source ports to new platforms like Linux, MacOS and OpenPandora.|
|Resident Evil: The Umbrella Chronicles||2007||2020||Rail shooter||Capcom||Source code was obtained in a 2020 ransomware attack against Capcom.|
|Robotron: 2084||1982||2021||Multidirectional shooter||Vid Kidz||On January 7, 2021, Jason Scott uploaded to GitHub the source code for the original arcade version of Robotron: 2084.|
|Rolling Thunder||1987||2016||side-scrolling action game||Tiertex Design Studios||The Amiga version became available on a community forum.|
|The Simpsons: Hit & Run||2003||2021||Racing||Radical Entertainment||Source code obtained from a developer and released on 4chan on August 21, 2021.|
|SpongeBob SquarePants: SuperSponge||2001||2018||Platformer||Climax Development||The PlayStation version's development repository was released on GitHub in 2018, converted from an old Microsoft Visual SourceSafe repository. Curiously, it was discovered that the game contained code from the Linux kernel (specifically the vsprintf function, presumably used for debugging), and therefore violates the GNU General Public License. Source code for a very early build of the GBA version was also found.|
|S.T.A.L.K.E.R.: Clear Sky (X-Ray Engine 1.5.10)||2008||2014||FPS||GSC Game World||In August 2014 the source code for the game's X-Ray Engine 1.5.10 became available on GitHub under a non-open-source license. The successor's engine, X-ray 1.6.02, became available too. As of October 2019 the xray-16 engine community fork, "OpenXRay", achieved compiling state and support for the two games "Call of Pripyat" and "Clear Sky" with build 558.|
|Stargate||1981||2021||Scrolling shooter||Vid Kidz||On January 7, 2021, Jason Scott uploaded to GitHub the source code for the original arcade version of Stargate.|
|Star Trek: New Worlds||2000||2021||Real-time strategy||Binary Asylum||Source code from a prototype build was uploaded to archive.org in 2021.|
|Star Wars||1983||2021||Rail shooter||Atari, Inc.||During October 13–15, 2021, Jason Scott uploaded to GitHub 77 repositories containing source code to several Atari arcade games. Notable games include Tank 8/Ultra Tank, Quiz Show, Dominos, Sprint 2, Night Driver, Starship 1, Drag Race, Triple Hunt, Super Bug, Canyon Bomber, Avalanche, Super Breakout, Destroyer, Fire Truck, Tournament Table, Video Pinball, Football, Indy 4, Asteroids, Lunar Lander, Sky Diver, Missile Command, Red Baron, Asteroids Deluxe, Centipede, Warlords, Tempest, Battlezone, Space Duel, Gravitar, Liberator, Millipede, Quantum, Food Fight, Black Widow and Crystal Castles.|
|Star Wars Galaxies||2003||2014||MMO||Sony Online Entertainment||In 2013, a former Sony Online Entertainment employee leaked a copy of the 2010 production source code for the Star Wars Galaxies client, server, 3rd party libraries and development tools to a group of former players. The code was later leaked beyond its intended recipients and made available online. Live, free to play public servers and public development groups have since come into existence. The source code is centrally maintained by the open source project SWG Source and is available on GitHub.|
|Super 3D Noah's Ark||1994||2018||FPS||Wisdom Tree||In November 2018 the source code for SNES version was bought on eBay and released to the public.|
|Swashbuckler||1982||2019||Fighting||Datamost||In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.|
|Team Fortress 2||2007||2012||first-person shooter||Valve||A 2008 version of the game's source code was leaked alongside several other Orange Box games in 2012. In 2020, an additional 2017 build of the game was leaked.|
|Tempest 2000||1994||2008||tube shooter||Llamasoft||On 24 August 2008, the source code of Tempest 2000 was released by the defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection.|
|Tomb Raider II||1997||2021||Action-adventure game||Core Design||Source code was released on archive.org in 2021.|
|Tony Hawk's Underground||2003||2016||Sports game||Neversoft||The game's C++ source code was leaked in February 2016 to GitHub.|
|Turrican III||1994||2008||Run and gun||Factor 5||Amiga game, source code prototype associated with Peter Thierolf.|
|Turok: Dinosaur Hunter||1997||2017||First-person shooter||Iguana Entertainment / Acclaim Entertainment||In February 2017 the source code of the N64 version was sold on eBay for $2551.99 on a SGI Silicon Graphics Indy development machine which came from the Acclaim Entertainment liquidation. This source code was later released August 26, 2018, then reuploaded, non-encrypted to 4chan the following day.|
|Trespasser||1998||200x||Action-adventure, FPS||DreamWorks Interactive||The fan community got the original source code into hand by unknown means and created modifications and unofficial patches with it, the latest DirectX 9 port from 2016 and the development ongoing.|
|Ultima IX: Ascension||1999||2014||Role-playing video game||Origin Systems||In November 2014 the Ultima Codex Community was able to acquire the Ultima 9 source code from a former developer for offline archival to prevent permanent loss.|
|Ultimate Mortal Kombat 3||1994||2009||Beat'em up||Midway Games||The source code and artwork from the PSX version were recovered from floppies in 2009.|
|Unreal Championship 2||2005||2020||First-person shooter||Epic Games||Leaked to 4chan on July 29, 2020.|
|Up'n Down||1984||2018||Racing, maze||Sega||On May 17, 2018, Kevin Savetz uploaded scans of the complete source code of the Atari 8-bit conversion of Up'n Down donated by Charlie Kulas.|
|Urban Assault||1998||2016||Real-time strategy||TerraTools||Found on eBay.|
|Warcraft II: The Dark Saga||1997||2020||Real-time strategy||Blizzard Entertainment||Source code for the PlayStation version was uploaded to archive.org.|
|Wipeout Pulse||2009||2018||Racing game||Sony||The PSP version contains source code hidden inside a dummy file.|
|Wing Commander series||1990||2011||Space simulator||Origin Systems||The long lost source code of Wing Commander I was given to the fan-community in August 2011 by a former developer for the purpose of long-time preservation. Later most other parts of the series followed.|
|The Witcher 3: Wild Hunt||2015||2021||Role-playing game||CD Projekt Red||Source code obtained in a 2021 ransomware attack against CD Projekt Red, and was sold at auction for one million US dollars.|
|Watch Dogs: Legion||2020||2020||Action-adventure||Ubisoft||The source code can be found on a private tracker, its file is 560GB compressed.|
|Wizardry III: Legacy of Llylgamyn||1983||2021||Role-playing game||Sir-Tech||The source code was released on archive.org in 2021.|
|Xbox system software||2001||2020||Video game console operating system||Microsoft||In May 2020, the Xbox operating system source code was leaked.|
|Zork and other Infocom games||1977||2008||Adventure game||Infocom||In 2008 a back-up with the source code of all Infocom's video games appeared from an anonymous Infocom source and was archived by the Internet Archive's Jason Scott. On May 5, 2020, the Massachusetts Institute of Technology uploaded to GitHub the source code for a 1977 version of Zork.|
Games with reconstructed source codeEdit
Once games, or software in general, become an obsolete product for a company, the tools and source code required to re-create the game are often lost or even actively destroyed and deleted. On the closure of Atari in Sunnyvale, California, in 1996, the original source code of several milestones of video game history (like Asteroids and Centipede) were thrown out as trash.
When much time and manual work is invested, it is still possible to recover or restore a source code variant which replicates the program's functions accurately from the binary program. Techniques used to accomplish this are decompiling, disassembling, and reverse engineering the binary executable. This approach typically does not result in the exact original source code but rather a divergent version, as a binary program does not contain all of the information originally carried in the source code. For example, comments and function names cannot be restored if the program was compiled without additional debug information.
Using the techniques listed above within a "bottom-up" development methodology process, the re-created source-code of a game is able to replicate the behavior of the original game exactly, often being "clock-cycle accurate", and/or "pixel-per-pixel accurate". This approach is in contrast to that used by game engine recreations, which are often made using a "top-down" development methodology, and which can result in duplicating the general features provided by a game engine, but not necessarily an accurate representation of the original game.
|Title||Original release||Source code reconstructed||Genre||Original developer||Repository||Additional information|
|Albion||1996 (DOS)||2011||Adventure game||Blue Byte||||In 2011 via static recompilation from the original x86 binary executable a port for the ARM architecture of the Pandora handheld was created by fans. The community still updates this recompiled version and released also Windows and Linux builds in 2015, source code available on GitHub under MIT.|
|Another World||1991||2011||Platform game||Delphine Software International||[GitHub]||In 2011, Fabien Sanglard analysed Another World by reverse engineering and reconstructed, based on an earlier approach, a complete C++ source code variant of the internal virtual machine.|
|Bagman||1982||2010||Arcade game||Valadon Automation||In 2010 the French programmer Jean-François Fabre reconstructed C source code from the game to port it to modern platforms.|
|Bermuda Syndrome||1995 (Windows)||2007||Adventure game||Century Interactive||After the end of support for the game, Gregory Montoir reverse engineered in 2007 the game engine and wrote a substitute which allowed the porting of the game to modern platforms, like the OpenPandora handheld.|
|Boulder Dash||1984 (C64)||2016||Arcade game||First Star Software||The C64 version was bit accurate reverse engineered by enthusiasts in month long work in 2016. The group reverse engineered several more games also from this period, like The Castles of Dr. Creep 3, Miner 2049er, Lode Runner, Manic Miner and Beach Head.|
|The Castles of Dr. Creep||1984 (C64)||2010||Platform game||Edward R. Hobbs||||Robert Crossfield worked on a faithful engine for the game since 2010. The remake/reconstructed version got released for PC on Steam by Edward R. Hobbs & Robert Crossfield in September 2016.|
|Cannon Fodder||1993 (DOS)||2015||top-down shooter||Sensible Software||||In December 2015, Robert Crossfield released version 1.0 of the reverse engineered DOS CD Cannon Fodder version, under the name "OpenFodder" on GitHub under GPL.|
|Chasm: The Rift||1997 (DOS)||2016||First-person shooter||Action Forms||||Around 2016 a reverse engineered version became available on GitHub.|
|Citadel||1985 (BBC)||2018||Action-adventure game||Superior Software||Buildable, reverse-engineered assembler source for the BBC Microcomputer Model B version of the game was released on the Stardot forums in October 2018, by a user known as Diminished.|
|Commander Keen 5||1991 (DOS)||2017||Sidecrolling shooter||Id software||||In 2017 a pixel-accuracy aiming engine re-implementation, based on several disassembly/decompilation efforts, became available by David Gow. C99 source code is hosted on GitHub under GPLv2. Originally only meant for Keen 5, it now supports Keen 4, 5 and 6.|
|Diablo||1996 (Windows)||2018||Action RPG||Blizzard Entertainment||||In 2018 a reverse engineered version was released, based on previously accidentally released debug information and builds by Diablo developers. Builds and compiles successfully for modern OSes.|
|Diablo II||2000 (Windows)||2015||Action RPG||Blizzard Entertainment||In 2015 an unofficial port for the ARM architecture based Pandora handheld became available by static recompilation and reverse engineering of the original x86 version.|
|Digger||1983||1998||Arcade||Windmill Software||||Reverse engineered by Andrew Jenner in 1998, called Digger Remastered, released as GPL and ported for many platforms.|
|Driver 2||2000 (PS)||2020||Driving||Reflections Interactive||In 2020 a reverse engineered version was released, based on previously accidentally released debug symbols.|
|Dune II||1992 (Windows)||2009||Real-time strategy game||Westwood Studios||In 2009 a group started reverse engineering Dune II under the name OpenDUNE. The resulting code was released under GPLv2 and ported to other platforms like the Pandora.|
|Dungeon Keeper||1997||2005||realtime dungeon simulator||Bullfrog||Tomasz Lis reverse engineered a version called "KeeperFX", the resulting source code is released as GPLv3. After developer Lis stopped working on "KeeperFX" around 2016 the community took up the work in 2019 and continues the project as "KeeperFX Unofficial".|
|Dungeon Master||1989||2001||Dungeon crawler||FTL Games||In 2001 Dungeon Master (and its successor CSB) was released by Paul R. Stevens in a portable reverse engineered version called "CSBwin". CSBwin was reverse engineered from the game's Atari assembler code to a pure C version in months of work. In 2014 Christophe Fontanel released another reverse engineering project which tries to recreate all existing versions.|
|E.T. the Extra-Terrestrial||1982 (Atari)||2006||Arcade||Atari||In 2006 decompiled by Dennis Debro. Following that, several unofficial fixes for the game were released by a fan site.|
|Elite||1984 (BBC Micro)||2003||Space trading game||Ian Bell, David Braben||||Christian Pinder created Elite: The New Kind as faithful PC version by reverse-engineering platform-neutral C code from the original BBC Micro version of Elite. This version was withdrawn from the main distribution at David Braben's request in 2003. In September 2014, on Elite's 30th birthday, Ian Bell blessed Elite: The New Kind and re-released it for free on his website. Source code of the 1.0 version is available on a GitHub repository.|
|Escape from Colditz||1991 (Amiga)||2009||Action-adventure game||Mike Halsall, John Law / Digital Magic Software.||||Around 2009 some developers reconstructed from the Amiga version a C version under GPLv3. Ported then to many systems.|
|Exile||1988 (BBC Micro)||2012||Action-adventure game||Peter Irvin, Jeremy Smith||Around 2012 the assembly source code of the BBC Micro version was reconstructed and commented. Later author Peter Irvin blessed also the non-commercial redistribution of the Amiga version of the game.|
|Freeway||1981 (Atari)||19??||Arcade game||Activision||Decompiled and commented by Rebecca Heineman.|
|Football Manager||1982||2001||Sports game, Business simulation game||Kevin Toms||In 2001 Paul Robson developed an accurate remake of the original game by reverse engineering in C. The remake has since been ported to the GP2X and Google Android.|
|Frontier: Elite 2||1993||2006||Space trading game||Frontier Developments||Reverse engineered to C by Tom Morton until 2006.|
|Frontier: First Encounters (Elite III)||1995||2005||Space trading game||Frontier Developments||Frontier Developments announced in 2000 that FFE would be open-sourced under a GPL-similar license, but this never happened. In response, in October 2005 the game was reverse engineered by John Jordan and builds for modern operation systems were provided. Updated until December 1, 2009 and later continued by other programmers with builds like "FFE_D3D".|
|Final Fantasy VIII||1999||2019||Role-Playing||Square Enix||[GitHub]||In 2019, Marcin Gomulak rewrote the engine from scratch in C#.|
|Grand Theft Auto III||2001 (Windows)||2020||Action-adventure||DMA Design||Reverse engineered C++ source code, with support for multiple platforms based on GLFW, including the Nintendo Switch. Source code available at GitHub. It was hit with a DMCA takedown on February 20, 2021.|
|Grand Theft Auto: Vice City||2002||2020||Action-adventure||Rockstar North||Reverse engineering started in early May 2020 and finished in December, being based on the decompiled Grand Theft Auto III code. It was hit with a DMCA takedown on February 20.|
|Half-Life||1999 (Windows)||2013||FPS||Valve||Since 2002 Valve has released the source code of the game client and the game (server) in its SDK for modder use. The Goldsrc engine and its other components were reverse engineered in context of the Xash3d project. Ports to other systems became available, for instance Android or the OpenPandora.|
|Inner Worlds||1996 (DOS)||2016||Fantasy adventure platformer||Sleepless Software||||Originally shareware, in February 2000 the game was released as freeware in version 1.3. Source code reverse engineered around 2016.|
|Igor: Objective Uikokahonia||1994 (DOS)||2017||Point and click adventure||Pendulo Studios||||Reverse engineered by Gregory Montoir, now hosted on GitHub, currently beta status.|
|Heart of the Alien||1994 (Sega CD)||2004||Platformer||Interplay Entertainment||||After Heart of the Alien became unsupported and unavailable, Gil Megidish took up 2004 the effort of extracting a source code variant from the binary game by reverse engineering to make the game available again on modern platforms. The extracted source code was made open-source and is hosted freely available on SourceForge.|
|Jet Set Willy||1984 (ZX)||2014||Platformer||Software Projects||||This classic ZX Spectrum game was disassembled by Richard Dymond back into Z80 source code, and includes some very comprehensive comments.|
|J.R.R. Tolkien's The Lord of the Rings, Vol. I||1990 (DOS)||2009||Adventure game||Interplay Entertainment||As the game is without official support for many years, a community developer reverse engineered the game engine and created around 2009 a substitute. The LPGLv2.1+ licensed open source project allowed the porting to modern platforms, for instance Windows, Linux and the OpenPandora handheld.|
|Kid Chameleon||1992 (Genesis)||Platformer||Sega Technical Institute||||Game disassembled by Sonic fan site Sonic Retro.|
|KKnD Extreme||1997 (Windows)||2017||Real-time strategy||Beam Software||||Reverse engineered and made available on GitHub by Alexandr Parshin.|
|Little Big Adventure||1994 (Windows)||2004||Action-adventure||Adeline Software International||||Reverse engineered after getting an "OK" by Frederick Raynal and placed on SourceForge (later GitHub) as "Twin-e".|
|Manic Miner||1983 (ZX)||2014||Platformer||Bug-Byte||||This classic ZX Spectrum game was disassembled by Richard Dymond back into Z80 source code, and includes some very comprehensive comments.|
|Mercenary, including Damocles and The Dion Crisis||1985||2007||Adventure game||Novagen Software||A computer scientist fan reverse engineered all of the game engines and created a clone of the complete game series.|
|Metroid||1986 (NES)||?||Run and gun/Action-adventure game||Nintendo||||The NES game was disassembled by the collaborative work of several developers over the course of years and modified to run on the more powerful MMC3 chip.|
|Might and Magic 6/7/8||1998 (Windows)||2016||RPG||New World Computing||||Reverse engineered as world-of-might-and-magic on GitHub by Alexandr Parshin and other programmers.|
|Minecraft||2009 (Windows)||2010||Sandbox game||Mojang||The Mod Coder Pack (MCP) offered scripts for de-obfuscation/decompilation of the Java-based version of Minecraft starting in 2010. The Mod Coder Pack was discontinued after Mojang began releasing deobfuscation mappings with each update in 2019.|
|Nicky Boum||1992||2007||Platform game||Microïds||Reverse engineered by Gregory Montoir and open sourced in March 2006 with version 0.1.5. The engine reached with v0.2.0 playable status when development and distribution of the source code was stopped. The source code was made in 2017 available on GitHub for some time, before the repository was set to private.|
|Oo-Topos||1982 (Apple II)||2015||Interactive fiction||Penguin Software||||Penguin Software released several of their Comprehend Adventure engine games as freeware, also from the Transylvania series. After end of official support, Ryan Mallon reconstructed around July 2015 a source code variant of the game's engine to port these games. Ryan Mallon works also on reverse engineering The Lost Vikings engine.|
|Out Run||1986 (Genesis)||2012||Arcade racing||Sega||||Since around 2009 a game enthusiast worked on decompiling source code of Out Run. In 2012 a truthful engine, called "Canon Ball", was released on GitHub. To run the game, the original game's assets are required. Ports to many systems followed, like OpenPandora.|
|Pokémon Red and Pokémon Blue||1996 (GBC)||2014||Role-playing video games||Nintendo||||Reverse engineered assembly of the Game Boy Color game on github.com.|
|Pokémon Crystal||2001 (GBC)||2014||Role-playing video games||Nintendo||||Reverse engineered assembly of the Game Boy Color game on github.com.|
|Pong||1972||2012||Arcade game||Atari||The available schematics ("source code") was reconstructed and adapted for modern and available electronic parts to a new PCB design in 2012.|
|RollerCoaster Tycoon 2||2002 (Windows)||2014||Business simulation game||Chris Sawyer||||In April 2014 a project to reverse engineer Roller Coaster Tycoon 2 into platform independent C source code, was started under the name OpenRCT2 by Ted 'IntelOrca' John. Hosted as GPLv3 licensed open-source software on GitHub, it requires the original game's graphics and sound assets.|
|PowerSlave||1996||2015 (console version)||FPS||Lobotomy Software||On May 24, 2015, an unofficial remake based on the PlayStation version was released by Samuel "Kaiser" Villarreal for free. In May 2015 publisher Night Dive Studios acquired the game rights, Villarreal and Night Dive Studios working on a digital distribution re-release. On January 2, 2017, Kaiser released the source code of his reverse engineered engine under the GPLv3 license on GitHub.|
|2019 (PC version)||||In November 2019 a reverse engineered port of the DOS version of Powerslave was released. The source code was released under the GPLv2 license.|
|Silent Hill 3||2003||2018||Survival horror||Konami||[GitHub]||In 2018, Palm Studios published a remake of the engine, written in C++ and using OpenGL.|
|Sonic the Hedgehog and Sonic the Hedgehog 2||2013 (Windows)||2021||Platform||Christian Whitehead, Simon Thomley||||In January 2021, the games' 2013 remasters were decompiled, with the code released on GitHub.|
|Snipes||1983 (DOS)||2016||early networked Multi player game maze game||SuperSet Software||||In July 2016, a faithful port by reverse engineering the original game became available. Permission was granted by original authors Drew Major and Kyle Powell to make it public. The full C/C++ source code is available at GitHub.|
|Super Bomberman||1993 (SNES)||2015||Action, Maze||Hudson Soft||||Reverse engineered assembly and build system of Super Bomberman by Lior Helphon on GitHub. Rebuilds several different versions of the game, and can restore some disabled debug features.|
|Super Mario Bros||1985 (NES)||2012||Platformer||Nintendo||||Commented disassembly of SMB on GitHub. A statically reverse engineered version, compiling and running with SDL was developed around 2017/2018.|
|Super Mario Bros. 3||1988 (NES)||2017||Platformer||Nintendo||||Commented disassembly of SMB3 on GitHub.|
|Space Ace||1984 (Apple IIGS)||2015||Interactive movie||Advanced Microcomputer Systems||||In July 2015 Rebecca Heineman released a reverse engineered Apple IIGS source code version on GitHub.|
|Space Invaders||1978||2019||Arcade||Taito||||In December 2019 a C translation by Jason McSweeney was released on GitHub.|
|Star Castle||1980 (Atari 2600)||2012||Arcade||Atari||Former Atari engineer D. Scott Williamson re-created in three years work Star Castle faithfully for the Atari 2600. After a successful crowdfunding campaign on Kickstarter, he released everything for free on his website, including source code.|
|Starcraft||1998 (Windows)||2014||Real-time strategy||Blizzard Entertainment||By static recompilation and reverse engineering of the original x86 binary to an intermediate C "pseudo-assembly" source code, an unofficial version for the Pandora handheld and the ARM architecture became available in 2014.|
|Stardew Valley||2016||2016||Farming simulation||Eric "ConcernedApe" Barone||||Decompiled for fan patches and mods.|
|Star Wars Episode I: Racer||1999||2017||Arcade racing||LucasArts||||Reverse engineering of the code since 2017. Currently only a small part of the source code is reverse engineered, it is partly emulation. The main functionality is still coming from the original binary where newly created replacement parts are spliced-in in runtime.|
|Star Wars Jedi Knight: Dark Forces II||1997||2013||FPS||LucasArts||||Since 2013, a recreation of the engine has been in development on GitHub.|
|Strike Commander||1993 (DOS)||2013||Flight simulator||Origin Systems||||In 2013 a SC reverse engineering project by Fabien Sanglard with a reconstructed source code variant became available on GitHub as the original source code was most probably lost in the take over of Origin by EA (Abandonware).|
|Styx||1983||1998||Arcade||Windmill Software||Reverse engineered by Andrew Jenner in 1998, implemented in x86 assembly with the title Styx Remastered and released as GPL.|
|Super 3D Noah's Ark||1994 (DOS)||2015||FPS||Wisdom Tree||||In October 2015 a community reconstructed, under usage of already released id software engine code, source code variant became available on Bitbucket.|
|Super Mario 64||1996 (N64)||2019||Platform game||Nintendo||||In 2016,[irrelevant citation] enthusiasts began to rewrite every function by hand, referencing a MIPS disassembly, then compile the code with the game's original compiler in qemu-irix, resulting in an identical copy of the game. This took advantage of the fact that Nintendo didn't turn on any compiler optimizations for the first Japanese and US releases. Their work was leaked on 4chan in June 2019 but it was finally released in late August of the same year.|
|Syndicate Wars||1996 (DOS)||2010||Real-time tactics||Bullfrog Productions||In January 2010 a reverse engineering project of the MS-DOS-based Syndicate Wars was finished by two developers and builds for Windows, Mac and Linux were released. It is complete beside networking and joystick code.|
|The Great Escape||1986 (ZX)||2016||Arcade adventure||Denton Designs||||David Thomas started in 2012 a reverse engineering project to create portable C source code from the ZX Spectrum version's binary, which reached in January 2016 compiling state.|
|The Last Ninja||1987 (Amiga)||2009||Action-adventure game||System 3||||Robert Crossfield reverse engineered a faithful engine from the Amiga version of the game since 2009. First three levels complete.|
|The Legend of Zelda: Ocarina of Time||1998 (Nintendo 64)||2021||Action-adventure game||Nintendo EAD||||Reverse-engineered over the span of two years, users decompiled the PAL debug ROM of the Master Quest release for speedrunners to more deeply understand the game.[failed verification]|
|Tomb Raider: Chronicles||2000 (PS)||2017||Action-adventure game||Core Design||||Around February 2017 PSX SDK tools and debug symbols leaked to a forum which ignited a reverse engineering project on GitHub. Status, compiling.|
|Touhou Project (1 to 5)||1996||2014||Shoot 'em up||Team Shanghai Alice||||"The Touhou PC-98 Restoration Project" was started around 2014 on GitHub on base of found source code of libraries. In progress.|
|Touhou Project (from 6 onwards)||2002||2014||Shoot 'em up||Team Shanghai Alice||"PyTouhou" is a free and open source reimplementation of Touhou 6 engine in Python and now Rust by three French programmers: Emmanuel Gil Peyrot, Thibaut Girka and Gauvain Roussel-Tarbouriech. While the Python branch is mostly complete, albeit for a few bugs, the Rust branch is still a work-in-progress. Other Touhou Project engine reimplementations after the 5th installment are a work-in-progress.|
|Transport Tycoon Deluxe||1994 (DOS)||2004||Business simulation game||Chris Sawyer/Microprose||||In 2003, Ludvig Strigeus started to reverse engineer Transport Tycoon Deluxe and convert the game to C. In 2004, this re-engineered Transport Tycoon Deluxe was released and christened OpenTTD and is still under active development by the community.|
|Ultima 3: Exodus||1983||2002||RPG||Richard Garriott||||Disassembled and ported to GBC in 2001 by Sven Carlberg. Richard Garriott was aware and pleased by this work.|
|Undertale||2015||2019||Role-playing video game||Toby Fox||The game's decompiled source code was uploaded to GitHub in February 2019, although it has since been taken down.|
|Zorgons Revenge||1983 (Oric)||2014||Shooter||John Sinclair||||Jean-François Fabre created binary translation libraries for Oric BASIC and assembly code to portable C and used it for nine games. Source code re-created and released for: House of Death, L'Aigle d'Or, Le Manoir du Dr Genius, Le Retour du Dr Genius, Rendez-vous de la Terreur, Xenon 1, Strip 21, Zebbie, Zorgons' Revenge. Build available for the OpenPandora.|
|ZZT||1991 (DOS)||2020||Action-adventure, puzzle||Tim Sweeney / Potomac Computer Systems||||ZZT's source code got reconstructed by Adrian Siekierka in 2020. Compilation with Turbo Pascal 5.5 produces an identical .EXE file than the original release. Done with permission from Tim Sweeney (who lost the original source code). The source code is released under a permissive license on GitHub.|
- Category:Commercial video games with freely available source code.
- List of open-source game engines
- List of open-source video games
- List of formerly proprietary software
- List of commercial video games released as freeware
- List of freeware games
- List of proprietary source-available software
- Source port
- Source-available software
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Before there was a Leisure Suit Larry, Chuck Benton created the only non-graphic game Sierra ever sold, Softporn for the Apple ][. I later used its puzzles as the basis for LSL1: Leisure Suit Larry in the Land of the Lounge Lizards. Still later, Gary Thompson reprogrammed it for the IBM PC. Here's your chance to see whether the changes I made to this classic game were improvements or not! Click here to download "Softporn" and see 1981 for yourself!
- softporp.zip (PC version) on ifarchive.org
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- IamA Founder of Night Dive Studios, Stephen Kick - We track down and restore classic video games! AMA! Archived 2016-07-21 at the Wayback Machine by Stephen Kick on reddit.com "Lost source code is one of the things that genuinely depress me and we're currently evaluating the idea of releasing the code we've discovered and restored to anyone who wants to store it or modify it.[...] We have released the source to Strife: Veteran Edition and we are planning on releasing more code in the future." (22 June 2016)
- System Shock Remake Feedback Request - Night Dive Studios on systemshock.org "We've also tracked down the source code to the original game and will be releasing it to the community once it's ready." (10 February 2016)
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- Howard Wen (2003-01-02). "Falcon's Eye: The Making-Over of Nethack". ONLamp.com. O'Reilly Media. Archived from the original on 2008-11-06.
- The History of Rogue: Have @ You, You Deadly Zs Archived 2016-03-04 at the Wayback Machine by Matt Barton & Bill Loguidiceon on Gamasutra "Falcon's Eye lives as a fork called Vulture's Eye."
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These games were rescued from Atari ST format diskettes that were thrown out behind 1196 Borregas when Atari closed up in 1996. The Atari Museum rescued these important treasures and recovered them from the diskettes.
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- "This source code release is meant to highlight how fragile things really are. It's The Bilestoad, the 1982 brilliant creation by Mark Goodman under the name Mangrove Earthshoe, for the Apple II, for DataMost". Twitter. 20 April 2019. Retrieved 27 December 2019.
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This was originally posted on eludevisibility.org when I (Matthew Callis) originally bought these disks off eBay
- Savetz, Kevin (17 May 2018). "Here's the source code for Buck Rogers, from our new old friend Charlie Kulas". AtariAge. Retrieved 9 April 2020.
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- Smith, Quintin (2010-12-14). "Dark Engine Source Code Found In A Bag". Rock Paper Shotgun. Archived from the original on 2011-04-26. Retrieved 2011-04-15.
As of this weekend, Christmas has come early for the Through the Looking Glass community. A CD’s been discovered containing the source code for the Dark Engine, aka the engine used by Thief, Thief II and System Shock 2 (not to mention Irrational and Looking Glass’ cancelled cold war spy game Deep Cover).
- Humphries, Matthew (2010-12-14). "Game engine used for Thief/System Shock 2 found with Dreamcast dev kitGames". Rock Paper Shotgun. Archived from the original on 2015-07-05. Retrieved 2015-07-04.
If you asked me which is my favorite all time video game, my number one would be Thief II. So it’s with more than a little excitement that I report the source code for the Dark Engine, used to create Thief, Thief II, and System Shock 2, has been found.
- Le Corbeau (2012-09-25). "Thief 2 V1.19 & System Shock 2 V2.4". ttlg.com. Archived from the original on 2012-11-10. Retrieved 2012-11-10.
This is an unofficial patch for Thief II: The Metal Age (T2) which updates the game from v1.18 to v1.19, providing improved support for modern hardware and correcting many known bugs.
- Pearson, Craig (2012-02-07). "Thief 2 Is Now On Good Old Games". Rock Paper Shotgun. Archived from the original on 2012-11-11. Retrieved 2012-11-10.
[...]discovered that it suffers much of the same resolution and widescreen based trouble from the previous release, but this utility [Tafferpatch] fixed all my troubles [...]
- "Tafferpatcher: unofficial complete patch for Thief 2". www.ttlg.com. 2012-11-10. Archived from the original on 2012-11-09. Retrieved 2012-11-10.
Included patches: - Patch 1.19 which eliminates all issues with modern hardware, widescreen resolutions, multi-core systems, etc.- Various mission, gamesys, model and texture fixes.[...]
- timothy (2012-08-07). "Dark Reign 2 Goes Open Source". slashdot.org. Archived from the original on 2013-09-21. Retrieved 2013-08-13.
- "darkreign2". google code. 2011-09-01. Archived from the original on 2013-08-10. Retrieved 2013-08-19.
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- Vendel, Curt (9 February 2008). "Desert Falcon Source Code". AtariAge. Archived from the original on 24 May 2021. Retrieved 18 September 2021.
- Donkey Kong source code Archived 2015-09-28 at the Wayback Machine at AtariAge.com
- Donkey Kong source code Archived 2015-09-28 at the Wayback Machine "I think it's pretty cool that this is finally released. Have fun. (Curt should find Super Pac-Man and do that one, too...)"
- DragonII Archived 2016-07-21 at the Wayback Machine on archive.org
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- Humphries, Matthew (2011-05-25). "Eve Online source code posted online, DMCA takedown quickly follows". geek.com. Archived from the original on 2015-11-18. Retrieved 2015-11-07.
It looks as though someone has posted the source code for the space MMO Eve Online there. As you’d imagine, developer CCP isn’t too happy about this and was quick to issue the takedown request.
- "dmca/2011-05-24-cpp-virtual-world-operations.markdown". Archived from the original on November 8, 2015.
- extreme-g-3-racing-compiling-journey on assemblergames.com (2015, archived)
- "Eye of the Beholder II Engine Westwood Studios 1991 Source Code".
- Bertolone, Giorgio (2011-03-12). "Interview with Kevin Klemmick – Lead Software Engineer for Falcon 4.0". Cleared-To-Engage. Archived from the original on 2011-03-18. Retrieved 2014-08-31.
[C2E] In 2000 the source code of Falcon 4.0 leaked out and after that groups of volunteers were able to make fixes and enhancements that assured the longevity of this sim. Do you see the source code leak as a good or bad event? [Klemmick] "Absolutely a good event. In fact I wish I’d known who did it so I could thank them. I honestly think this should be standard procedure for companies that decide not to continue to support a code base."
- "FreeFalcon". GitHub. 2013-01-24. Archived from the original on 2015-10-25. Retrieved 2013-09-11.
- "Steam Discussions: Is the DRM free version in that Humble Bundle the source code?". 2015-05-17. Archived from the original on 2020-05-05.
- When EA Sports Accidentally Put a Game's Source Code on a Demo Disc by Luke Plunkett on kotaku.com (02-05-2012)
- 1997-fifa-partial-source-code-leak on assemblergames.com
- ProjectX brings Forsaken on modern systems and lets you to free play at 1920 x 1080 Archived 2015-07-22 at the Wayback Machine (2013-03-30)
- ForsakenX Archived 2015-10-26 at the Wayback Machine on github.com
- license Archived 2015-10-26 at the Wayback Machine on GitHub.
- Gunz 1.5 Source Code released. Archived 2014-07-24 at the Wayback Machine on ragezone.com (20 November 2011)
- "Hagar the Horrible C64 Kingsoft 1992 Source Code".
- Parkin, Simon (2014-05-25). "The boy who stole Half-Life 2". Eurogamer. Retrieved 2019-12-01.
- Electronic Arts, KnowWonder (September 6, 2002). "Harry Potter and the Chamber of Secrets IBM PC Game Prototype (HP 2 CoS)" – via Internet Archive.
- Cifaldi, Frank (1 June 2016). "I uh, found the source code for Home Alone 2 for the NES on an old hard drive, if...anyone wants that?". Twitter. Archived from the original on 3 June 2016. Retrieved 30 March 2020.
- Home Alone 2 (NES) source code found/made available on nesdev.com
- "historicalsource/joust". January 25, 2021 – via GitHub.
- gamecube-killer7-source-code Archived 2016-12-30 at the Wayback Machine on assemblergames.com (October 2016)
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- CRACKING THE CODE Online IP Theft Is Not a Game on FBI.gov (2007-02-01)
- Scott, Jason [@textfiles] (20 May 2021). "And now: The full source code to the 1983 game MAD PLANETS, written by Kan Yabumoto for Gottlieb. Scanned sheet by sheet and with full comments and explanations by Yabumoto, who died in 2017" (Tweet). Archived from the original on 20 May 2021. Retrieved 20 May 2021 – via Twitter.
- "Metal Arms: Glitch in the System Source Code". June 14, 2003 – via Internet Archive.
- "We Are Morons: a quick look at the Win2k source". Kuro5hin.org. Archived from the original on 2019-05-08. Retrieved January 6, 2012. Alt URL
- "Today's release: The source code to Hasbro's 1999 #Monopoly PC game. The code is dated after release: 29 October 2000, so this may be from a later international effort". Twitter. 2 August 2018. Retrieved 27 December 2019.
- "Full Source Code: Hasbro's Monopoly (PC, 2000) - For reference and education". /r/gamedev. 21 January 2019. Retrieved 27 December 2019.
- Papadopoulos, John (October 24, 2018). "The source codes for Mortal Kombat Trilogy Nintendo 64 and Mortal Kombat 3 have been leaked online".
- "The source codes for Mortal Kombat Trilogy Nintendo 64 and Mortal Kombat 3 have been leaked online". n4g.com.
- "Monsters, Inc. PS2 source code and assets". March 19, 2002 – via Internet Archive.
- code-source-mr-nutz-2 Archived 2015-07-07 at the Wayback Machine on assemblergames.com
- amiga source on gilgalad.arc-nova.org
- "The Muppets On The Go! - Source Code" – via Internet Archive.
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- "Data Design Interractive". GitLab.
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- "Oni Bungie Source?".
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- "Look what fell off the back of a truck! The original, commented source code for the Atari 8-bit version of Pac Man. [...] There are 2 versions there: the original from 1982 that compiled in Atari Macro Assembler, & a version adapted for the modern MADS assembler". Twitter. 27 August 2019. Retrieved 27 December 2019.
- "Pac-Man Atari 800 Source Code". Retrieved 27 December 2019.
Hello from Fujiama! Here's something amazing that's turned up: the original, commented source code for the Atari 8-bit version of Pac Man.
- pesterminatorsourcecode on the internet archive (2019)
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- "POSTAL 3 + TEAM FORTRESS 2 2007 Builds/Design Docs LEAKED" – via www.youtube.com.
- "Ragnarok Online 2 Official Source Code ! - RaGEZONE - MMO development community". forum.ragezone.com.
- "Raid 2020 Source Code". December 17, 1989 – via Internet Archive.
- "Archived copy". Archived from the original on 2011-12-10. Retrieved 2012-02-29.CS1 maint: archived copy as title (link)
- Revolt on the Xbox Archived 2017-02-02 at the Wayback Machine by Borman on Assemblergames.com (Aug 3, 2014)
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- Of All Things, Re-Volt Is Still Being Patched Archived 2016-12-03 at the Wayback Machine by Alex Walker on Kotaku (Oct 27, 2015)
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- "historicalsource/robotron". January 25, 2021 – via GitHub.
- Preserving original Amiga game source codes Archived 2017-04-18 at the Wayback Machine on eab.abime.net (April 2016)
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- "SpongeBob SquarePants: SuperSponge GBA Roms + Design Backup". March 15, 2001 – via Internet Archive.
- xray Archived 2016-07-21 at the Wayback Machine on github.com (August 2014)
- xray-16 Archived 2016-07-21 at the Wayback Machine on github.com
- S.T.A.L.K.E.R.: How The OpenGL Port is Shaping Up Archived 2017-02-16 at the Wayback Machine on boilingsteam.com (November 1, 2015)
- OpenXRay (build 558) on GitHub
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- "Star Trek New Worlds Source Code : Binary Asylum : Free Download, Borrow, and Streaming".
- Messner, Steven (2015-12-30). "How Players Revived Star Wars Galaxies And EverQuest". Rock Paper Shotgun. Retrieved 2020-03-04.
- "Super Noah's Ark 3D (USA) (Source Code)". 2018.
- Smith, Jason. "Atari Jaguar Timeline". jaguarsector.com. Archived from the original on 2013-06-29. Retrieved 2019-08-19.
- Smith, Jason. "Jaguar Sector II Atari Jaguar Software Price and Rarity Guide". jaysmith2000.com. Archived from the original on 17 November 2013. Retrieved 2019-08-19.
- "Tomb Raider II Core Design Eidos 1997 Source Code".
- thug Archived 2017-06-27 at the Wayback Machine on github.com (February 2016)
- Acclaim / Iguana Entertainment Turok Source Code Silicon Graphics Indy Computer Archived 2017-02-05 at the Wayback Machine on ebay.com (February 2017)
- "Just like that, Turok source code is lost again : n64". Archived from the original on February 9, 2017.
- Acclaim Entertainment computers recovered from Brooklyn warehouse Archived 2017-02-05 at the Wayback Machine on vogons.org
- Bailey, Kat (2014-05-15). "Jurassic Park: Trespasser remake aims to make good on long-lost promises". joystiq.com. Archived from the original on 2014-08-14. Retrieved 2014-08-13.
The community has even managed to get hold of the original source code, which they've set to work modifying.
- Patches Archived 2015-09-08 at the Wayback Machine on trescom.org
- Sanglard, Fabien (2014-06-10). "Jurassic Park: Trespasser CG Source Code Review". fabiensanglard.net. Archived from the original on 2014-08-14. Retrieved 2014-08-13.
- 1.07 Archived 2017-05-22 at the Wayback Machine on trescomforum.org by Lee Arbuco (2016)
- WtF Dragon (2014-11-26). "Ultima 9: The Source Code". Ultima Codex. Archived from the original on 2015-11-25. Retrieved 2015-10-28.
As we continue to mark the occasion of Ultima 9’s fifteenth anniversary, I’m pleased to announced that the seemingly dormant Ultima Source Code Offline Archival Project (USCOAP) has finally borne some fruit: the Ultima Codex has added the source code for Ultima 9 to its offline archive.
- Ultimate_Mortal_Kombat_3_(3DO_Cancelled_Port) Archived 2016-07-21 at the Wayback Machine on lostmediawiki.com
- 3DO Ultimate Mortal Kombat 3 Archived 2016-07-21 at the Wayback Machine on assemblergames.com (Nov 15, 2009)
- Savetz, Kevin (17 May 2018). "Here's the source code for Up'N Down, from Charlie Kulas. I believe this is a pre-production version of the game. I have a later version as well, which I haven't scanned yet". AtariAge. Retrieved 9 April 2020.
- "Urban Assault (Aug 17, 1998 prototype with source code) - Hidden Palace". hiddenpalace.org.
- "Warcraft II: The Dark Saga - PS1 source code". March 15, 1997 – via Internet Archive.
- "BIG NEWS: Wing Commander I Source Code Archived!". wcnews.com. 2011-08-26. Archived from the original on 2013-11-09. Retrieved 2013-01-14.
Thanks to an extremely kind donation from an anonymous former EA/Origin developer, the source code to the PC version of Wing Commander I is now preserved in our offline archive! Because of our agreement with Electronic Arts, we're not allowed to post recovered source code for download--but rest easy knowing that the C files that started it all are being kept safe for future reference. Our offline archive contains material that has been preserved but which can't be posted, including other source code and budget data from several of the games.
- "Wing Commander III – The Source Code". wcnews.com. 2011-09-13. Archived from the original on 2013-12-03. Retrieved 2013-01-14.
As we celebrate Wing Commander III's first widespread retail availability since the late 1990s, we would like to mention for anyone that we have the game's source code in our offline archive. We know it's frustrating for fans, who could do amazing things with this, to read these updates... but it's also in everyone's best interests to remind EA that we have the raw material from which they could port Wing Commander III to a modern computer or console. Just let us know!
- "Wing Commander IV: Source Code". wcnews.com. 2012-04-03. Archived from the original on 2013-11-09. Retrieved 2013-01-14.
As with Wing Commander I and Wing Commander III, we are pleased to announced that an extremely kind former EA/Origin employee has provided a copy of the Wing Commander IV source code for our preservation efforts! We can't offer it for download at this time, but it is now preserved for future use.
- "Wizardry III Legacy of Llylgamyn Sir Tech 1983 Source Code".
- GET LAMP Raw Interviews Pretty Much Up Archived 2016-01-30 at the Wayback Machine on ascii.textfiles.com by Jason Scott (3 December 2012)
- Kohler, Chris (2008-04-18). "'Infocom Drive' Turns Up Long-Lost Hitchhiker Sequel". wired.com. Archived from the original on 2016-01-27. Retrieved 2016-01-26.
Remnants of the unreleased sequel to Infocom’s text adventure version of The Hitchhiker’s Guide to the Galaxy have been made available to the public by Waxy.org. Playable prototypes, design docs, source code and a string of e-mails between Infocom designers and management provide a fascinating look at the game’s turbulent, if aborted, development process. Among the assets included: design documents, e-mail archives, employee phone numbers, sales figures, internal meeting notes, corporate newsletters, and the source code and game files for every released and unreleased game Infocom made."
- Baio, Andy (Apr 17, 2008). "Milliways: Infocom's Unreleased Sequel to Hitchhiker's Guide to the Galaxy". waxy.org. Archived from the original on 2016-01-26. Retrieved 2016-01-26.
From an anonymous source close to the company, I've found myself in possession of the "Infocom Drive" — a complete backup of Infocom's shared network drive from 1989.[...] Among the assets included: design documents, email archives, employee phone numbers, sales figures, internal meeting notes, corporate newsletters, and the source code and game files for every released and unreleased game Infocom made
- Sharwood, Simon (8 May 2020). "Source code for seminal adventure game Zork circa-1977 exhumed from MIT tapes, plonked on GitHub". The Register. Situation Publishing. Archived from the original on 18 June 2020. Retrieved 9 July 2020.
- Ciolek, Todd (2012-10-17). "Among the Missing: Notable Games Lost to Time". 1up.com. Retrieved 2015-06-19.
Prince of Persia creator Jordan Mechner believed that the source code to the game's original Apple II version was gone when he failed to find it in 2002. Ten years later, Mechner's father uncovered a box of old games at the family home, and among them were disks containing Prince of Persia's bedrock program.
- Andersen, John (January 27, 2011). "Where Games Go To Sleep: The Game Preservation Crisis, Part 1". Gamasutra. Archived from the original on April 22, 2013. Retrieved January 10, 2013.
The existence of decaying technology, disorganization, and poor storage could in theory put a video game to sleep permanently -- never to be played again. Troubling admissions have surfaced over the years concerning video game preservation. When questions concerning re-releases of certain game titles are brought up during interviews with developers, for example, these developers would reveal issues of game production material being lost or destroyed. Certain game titles could not see a re-release due to various issues. One story began to circulate of source code being lost altogether for a well-known RPG, preventing its re-release on a new console.
- "Bubble Bobble". Arcade History. September 11, 2012. Archived from the original on September 30, 2012. Retrieved January 10, 2013.
In 1996, Taito announced that they lost the original source code program to Bubble Bobble following a reorganization - when it came to the recent ports and sequels, they had to work from program disassembly, playing the game and (mainly) the various home computer ports.
- Barenblat, Adam (July 25, 2008). "Sega Can't Find The Source Code For Your Favorite Old School Arcade Games". Kotaku. Archived from the original on December 20, 2013. Retrieved December 1, 2013.
- Silent Hill HD was made from incomplete code on Destructoid Archived October 16, 2013, at the Wayback Machine
- oh-my-silent-hill-hd-collections-sucked-because-konami-lost-the-source-code on gameoverviews.com (2012)
- kingdom-hearts-1-data-is-lost-square-had-to-recreate-everything-for-hd Archived 2017-01-01 at the Wayback Machine on siliconera.com (2013)
- Parrish, Kevin (July 7, 2009). "Atari 7800 Source Code Rescued – Atari released the source code for the 7800 console and games". tomsguide.com. Archived from the original on April 22, 2014. Retrieved January 9, 2012.
- "7800 Games & Development". atari-museum.com. 2009. Archived from the original on July 6, 2009. Retrieved January 9, 2012.
These games were rescued from Atari ST format diskettes that were thrown out behind 1196 Borregas when Atari closed up in 1996. The Atari Museum rescued these important treasures and recovered them from the diskettes.
- M-HT (2011-11-06). "Albion". openpandora.org. Archived from the original on 2014-04-07. Retrieved 2014-04-03.
- M-HT (2011-06-11). "Albion". repo.openpandora.org. Archived from the original on 2014-03-31. Retrieved 2014-04-02.
This is a port of the game's executable for Pandora (using static recompilation/binary translation).
- M-HT (2015-03-16). "Albion". boards.openpandora.org. Archived from the original on 2015-04-23. Retrieved 2015-04-24.
Here is a version for Windows, in case anyone is interested. Unpack it into the directory where Albion is installed - read the Readme for more information (use Albion.cmd to run the game).
- github.com/M-HT/SR Archived 2017-05-07 at the Wayback Machine on github.com
- Patterson, Blake (2011-12-26). "A Fascinating Look Under the Hood of 'Another World'". toucharcade.com. Archived from the original on 2013-11-09. Retrieved 2013-10-14.
- Sanglard, Fabien (2011-12-23). ""Another World" Code Review". fabiensanglard.net. Archived from the original on 2013-01-15. Retrieved 2013-01-14.
I spent two weeks reading and reverse engineering further the source code of Another World ("Out Of This World" in North America). I based my work on Gregory Montoir's "binary to C++" initial reverse engineering from the DOS executable. I was amazed to discover an elegant system based on a virtual machine interpreting bytecode in realtime and generating fullscreen vectorial cinematic in order to produce one of the best game of all time.
- Bagman Archived 2017-03-08 at the Wayback Machine on jotd.pagesperso-orange.fr
- Bermuda Syndrome Archived 2016-07-21 at the Wayback Machine on cyxdown.free.fr
- cyxx Archived 2016-07-21 at the Wayback Machine on github.com
- Bermuda Syndrome for OpenPandora Archived 2016-07-21 at the Wayback Machine on openhandhelds.org
- commodore-64-rem-the-lost-art-of-source-code-archeology Archived 2016-04-10 at the Wayback Machine on commodore.ninja by Paulo Garcia (Mar 6, 2016)
- Boulder Dashes ReM (2016) Archived 2016-07-21 at the Wayback Machine on csdb.dk (2016)
- Reengine & Mod (ReM) Archived 2016-07-21 at the Wayback Machine on csdb.dk
- DrCreep Archived 2016-02-24 at the Wayback Machine on github.com
- The Castles of Dr. Creep Archived 2016-11-29 at the Wayback Machine on steam.com
- OpenFodder - Open sourced Cannon Fodder gets a big 1.0 release! on indieretronews.com
- Releases Archived 2016-07-21 at the Wayback Machine on github.com
- Chasem reverse on github.com
- "Citadel". stardot.org.uk. Retrieved 1 March 2019.
- Omnispeak — A Commander Keen Reimplementation Archived 2017-03-15 at the Wayback Machine on davidgow.net
- omnispeak Archived 2017-02-23 at the Wayback Machine on GitHub
- "devilution". 2015-12-08. on GitHub (June 2018)
- Diablo II Running on Open Pandora! Archived 2015-12-08 at the Wayback Machine on PandoraLive (22 November 2015)
- notaz (2015-11-22). "Diablo II". openpandora.org. Archived from the original on 2015-12-20. Retrieved 2015-12-04.
This is statically recompiled Windows executable, that was recompiled to ARM and bundled with ARM version of wine.
- download Archived 2011-10-17 at the Wayback Machine on digger.org
- Macgregor, Jody (15 November 2020). "Driver 2 has an unofficial PC port". PC Gamer. Future plc. Archived from the original on 15 November 2020. Retrieved 19 November 2020.
- OpenDUNE Archived 2016-03-29 at the Wayback Machine on github.com
- dunedynasty Archived 2016-04-04 at the Wayback Machine on repo.openpandora.org
- "Home - DK Maps'n'Tools Base". lubiki.keeperklan.com. Archived from the original on July 4, 2015.
- KeeperFX Unofficial 0.4.7 on keeperklan.com (2019)
- Chaos Strikes Back for Windows (and Linux, MacOS X, Pocket PC) Archived 2016-01-21 at the Wayback Machine on Dungeon Master Encyclopedia (2005-10-24)
- Walker, John (2012-03-29). "You Could Be Playing Dungeon Master Right Now". Rock Paper Shotgun. Archived from the original on 2015-07-29. Retrieved 2015-08-03.
There is a version that just works, without an emulator, and it’s free. [...] A madman by the name of Paul Stevens spent six months, eight hours a day, writing 120,000 lines of what he calls “pseudo-assembly language” to rebuild it in C++. And then released the game and source code for free. Can he do that? I’ve decided that yes, he can, which legitimises my promoting it to you.
- Back to the source: ReDMCSB Archived 2016-04-25 at the Wayback Machine by Christophe Fontanel (18-Jan-2014)
- Is it possible to reverse engineer software without its source code? on quora.com by Doug Bell "lead developer of "Dungeon Master": Yes. Here's an example."
- Johnson, Phil (2014-05-06). "Digging up E.T.'s source code". ITworld. Archived from the original on 2016-04-07.
The code, written in assembly language for the MOS Technology 6502 8-bit processor, has been around for a while, having been reconstructed by Dennis Debro in 2006.
- E.T. the Extra-Terrestrial(1982) Atari 2600 Source Code Archived 2016-03-25 at the Wayback Machine on pastebin.com
- Original Game Disassemblies Archived 2016-12-17 at the Wayback Machine on bjars.com
- "Fixing E.T. The Extra-Terrestrial for the Atari 2600". Neocomputer. Archived from the original on April 8, 2013. Retrieved April 6, 2013.
- "NewKind". Christian Pinder. Archived from the original on 2008-08-09. Retrieved 2008-08-09.
- "Bell and Braben See Eye-to-eye as Original Elite Sees Dual Re-release". cabume.co.uk. 25 September 2014. Archived from the original on 2015-04-13.
- Martin, Matt (2014-09-17). "Classic space sim Elite goes free this weekend". vg247. Archived from the original on 2015-10-17. Retrieved 2015-11-06.
"A superior remake of the original space trading game Elite will be released for free this weekend, 30 years after the original game launched"
- Bell, Ian (2014-09-20). "Elite 30th Anniversary". elitehomepage.org. Archived from the original on September 2, 2015.
"Today, 20th September 2014 is the 30th anniversary of the day the world first experienced Elite, the 3D space trading and combat game written by Ian Bell and David Braben in conjunction with Acornsoft. From that beginning on the BBC Micro and Acorn Electron, the game went on to be released for most home computers of the time. Celebrate by playing Elite again, for free. Thanks to Matt Goldbolt, the original BBC Micro version now runs direct in the Google Chrome browser if you click here. Or for Windows PCs, download Christian Pinder's Elite: The New Kind by clicking here."
- newkind Archived 2015-12-12 at the Wayback Machine on GitHub.
- "colditz escape!". 2010. Archived from the original on 2016-03-10. Retrieved 2016-01-14.
- colditz-escape Archived 2016-07-21 at the Wayback Machine on github.com
- "Exile disassembly". level7.org.uk. 2012. Archived from the original on 2013-04-13. Retrieved 2013-01-14.
Published by Superior Software in 1988, Exile is widely regarded as the most technically advanced game released for the BBC Micro. Featuring an enormous procedurally generated landscape, a complete physics engine and a host of game elements to interact with, it remains unsurpassed in pushing the capabilities of the system to their limits.
- Exile Archived 2016-05-07 at the Wayback Machine on thunderpeel2001.com/exile "Email from Peter Irvin (creator of Exile): Yes I've recently decided to allow old versions of Exile to be downloaded for emulation under certain conditions: [...]"
- Paul Robson's SDL Games Archived 2016-06-23 at the Wayback Machine "Football Manager - A remake of the (in)famous Sinclair Spectrum Football Manager game, complete with stick-man graphics. This is reverse engineered, so it should play identically. Finished. fm-0.99.tar.gz" (May 2004)
- GP2X version at GP2X Archive (archived)
- GLFrontier Project Page!!!1 Archived 2015-11-10 at the Wayback Machine on noflag.org.uk "This WAS the Atari ST version of the game Frontier: Elite 2 by the great man mentioned previously. It was disassembled, OS calls and hardware access removed, and originally run on a stripped down ST emulator (Hatari). Now it is compiled to C or native x86, and run much faster without 68K emulation. Most recently it has been modified to draw stuff with OpenGL at any shiny resolution with 8xAA, etc. A dandy evolution for a crappy old Atari ST game."
- News on eliteclub.co.uk "8th November 2000 - Following much discussion on the subject of open-source by the Elite community, we have decided to make some alterations to our previous plans for the Elite Club - we are going to relax some of the restrictions we were intending to put on the distribution of the source code. The source code will now be distributable more freely, under a licence agreement similar to the GPL (GNU Public Licence)."
- Welcome Commander,to the AmigaFFE Project Archived 2016-03-05 at the Wayback Machine "after I have seen the announcement of a release of the Sources of Frontier Elite II and Frontier First Encounters on the Eliteclub I was very happy with it. Now it is 2001 (around 2 years since the announcement) and they still haven't released it"
- Jordan, John (2009-12-01). "JJFFE Central". jaj22.org.uk. Archived from the original on 2011-03-03. Retrieved 2015-11-06.
What is JJFFE? JJFFE is set of recompiled replacement executables for the 1995 Frontier Developments game Frontier: First Encounters. There are currently versions that run under Windows 95/98/ME, Windows 2000, Windows XP, Windows NT4, OS/2, Linux and Mac. As well as running on many more operating systems than the original, JJFFE also includes minor improvements and bugfixes.
- FFE_D3D Archived 2014-07-16 at the Wayback Machine on alioth.net
- "GTA 3 Ported to Nintendo Switch, But Not by Rockstar Games". GAMING.
- re3 on github.com
- Yin-Poole, Wesley (February 20, 2021). "GTA 3 and Vice City reverse-engineering fan project hit with DMCA takedown".
- "GTA III and Vice City get reverse engineered with a new game engine". GamingOnLinux.
- Yin-Poole, Wesley (February 17, 2021). "How a small group of GTA fanatics reverse-engineered GTA 3 and Vice City without (so far) getting shut down".
- halflife Archived 2017-06-27 at the Wayback Machine on github.com/ValveSoftware
- xash3d-engine Archived 2016-12-20 at the Wayback Machine on indiedb.com
- halflife on github.com/ptitSeb
- download on internet archive (February 2000)
- download on sleepless software
- open-iw on github.com
- igor on github.com
- Heart of the Alien Redux Archived 2016-10-25 at the Wayback Machine on sourceforge.net
- Jet Set Willy on github.com
- lotr Archived 2014-02-01 at the Wayback Machine by Michal Beneš on wonderland.cz
- Lord of the Rings on pyra-handheld.com (2017)
- Kid Chameleon on GitHub
- OpenKKND on GitHub
- Twin-e Archived 2015-07-25 at the Wayback Machine on SourceForge
- Twine-e Archived 2015-10-26 at the Wayback Machine on GitHub.
- 'Alone in the Dark 1' recode released - v0.1 Archived 2015-10-26 at the Wayback Machine on vogons.org
- Manic Miner on github.com
- MDDClone (2007)
- MetroidMMC3 Archived 2016-07-21 at the Wayback Machine on github.com
- Metroid Source Code Archived 2016-01-04 at the Wayback Machine on metroid-database.com
- world-of-might-and-magic on GitHub
- The Mod Coder Pack Archived 2016-08-30 at the Wayback Machine on modcoderpack.com
- Nathan Adams [@Dinnerbone] (4 September 2019). "I've been pushing for this for a while, so I'm really happy that we were finally able to release the obfuscation mappings public. @SeargeDP had a great idea to release the 1.14.4 mappings as comparison, so those are going out right now" (Tweet). Retrieved 11 May 2021 – via Twitter.
- nicky on cyxdown.free.fr (December 26, 2007)
- nicky on github.com/cyxx
- The Comprehend Adventures Archived 2016-07-26 at the Wayback Machine on graphicsmagician.com
- recomprehend by Ryan Mallon on github.com
- "RyanMallon/TheLostVikingsTools". March 2, 2021 – via GitHub.
- outrun-decompilation-project Archived 2016-12-21 at the Wayback Machine (2009-08-01)
- Cannonball-manual Archived 2014-09-06 at the Wayback Machine on github.com
- cannonball_ptitseb Archived 2016-12-20 at the Wayback Machine on repo.openpandora.org
- pokered Archived 2016-07-21 at the Wayback Machine on github.com
- pokecrystal Archived 2016-07-21 at the Wayback Machine on github.com
- fabricating-hardware-from-the-original-arcade-pong-schematics Archived 2016-05-13 at the Wayback Machine on hackaday.com
- Pong Archived 2016-05-29 at the Wayback Machine on atarihq.com
- "Pong Reborn". Imgur. Archived from the original on June 10, 2016.
- "OpenRCT2 project – Open-Source adaption of RollerCoaster Tycoon 2, gets a beta release". indieretronews.com. 2015-09-08. Retrieved 2015-11-15.
I'm sure many of you remember the awesome game that is RollerCoaster Tycoon 2; a game by Chris Sawyer and published by Infograms in which you manage your very own theme park, with all its rides, shops, guests and economic fortune. Well that same game is now being given a much needed adjustment with the latest release of OpenRCT2 Project. An open source development which improves the game even further with new features, original bug fixes, raised game limits and much more! [...] Development started on April 2nd 2014 by Ted 'IntelOrca' John and thanks to numerous contributions from others
- "OpenRCT2". GitHub. Archived from the original on 2015-10-16. Retrieved 2015-11-15.
- Powerslave EX released Archived 2016-03-04 at the Wayback Machine, powerslaveex.wordpress.com.
- Ruhland, Perry (May 4, 2015). "An Interview With the Man Rebuilding Powerslave". TechRaptor. Archived from the original on November 19, 2015. Retrieved November 18, 2015.
- Turok: The Dinosaur Hunter PC remake to resume development this year Archived 2016-07-10 at the Wayback Machine on VideoGamer.com by James Orry "The news comes from PC dev Samuel "Kaiser" Villarreal, who leaked the news speaking to Tech Raptor. Kaiser is currently remaking '96 shooter PowerSlave, and was asked about giving the same treatment to Turok." (8th May, 2015)
- Source code to my hobby project, PowerslaveEX, has been made public! by SVKaiser on twitter.com
- PowerslaveEX Archived 2017-05-24 at the Wayback Machine on github.com
- I am announcing PCExhumed, my port of PowerSlave/Exhumed for MS-DOS to modern systems, using EDuke32 technology.
- Source code on github.com
- Sonic 1/2 2013 Decompilation Archived 2021-01-18 at the Wayback Machine on GitHub
- "VOGONS • View topic - Snipes ported to C/C++ with 100% logic compatibility and replay recording". www.vogons.org. Archived from the original on 2016-08-27. Retrieved 2016-08-25.
- Snipes on github.com
- superbomberman Archived 2016-07-21 at the Wayback Machine on GitHub by Lior Halphon
- A COMPREHENSIVE SUPER MARIO BROS. DISASSEMBLY Archived 2015-10-26 at the Wayback Machine on GitHub by doppelganger
- SuperMarioBros-C on github.com
- "Smb3". 20 September 2021.
- spaceace iigs Archived 2015-08-10 at the Wayback Machine on GitHub.
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- loadzero/si78c on github.com
- man-makes-star-castle-for-atari-2600-30-years-after-atari-said-it-couldnt-be-done Archived 2016-12-20 at the Wayback Machine on eurogamer
- star-castle-2600-story Archived 2016-12-21 at the Wayback Machine on starcastle2600.blogspot.com
- atari-2600-star-castle Archived 2017-03-21 at the Wayback Machine on kickstarter.com (2012)
- Release: Starcraft Archived 2016-01-28 at the Wayback Machine on pyra-handheld.com "As you can see it doesn't look much different from x86 disassembly, the only difference is that you can compile it for other 32bit archs (there is no way it would work on 64bit.."
- Steinlechner, Peter (2014-03-10). "Starcraft für ARM-Handheld kompiliert" (in German). golem.de. Archived from the original on 2014-03-30. Retrieved 2014-03-25.
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- "Under Construction". OpenSWE1R.
- "Early-development Jedi Knight: Dark Forces 2 game engine recreation". GitHub. 23 July 2021.
- Sanglard, Fabien (2014-01-22). "Reverse Engineering Strike Commander". Archived from the original on 2014-01-23. Retrieved 2014-01-23.
Most people assume the source codes and gold versions of all finished games were stored in a Vault somewhere at EA. But after getting in touch with people at Wing Commander CIC, it appeared that all the source code was lost when the company closed.[...] On his first day one developer managed to delete the full 900MB of Strike Commander source tree.
- libRealSpace Archived 2014-11-25 at the Wayback Machine on GitHub
- S3DNA DOS Source Code Reconstructed Archived 2015-11-17 at the Wayback Machine on 28. August
- w3d_plus Archived 2015-11-17 at the Wayback Machine on bitbucket.org
- Re: Restoration of a few games' EXEs versions Archived 2015-11-17 at the Wayback Machine on classicdosgames
- SM64 Decompilation Project! on SMW Central (2 October 2016)
- Super Mario 64 has been decompiled on reddit (2019)
- "n64decomp/sm64". March 15, 2021 – via GitHub.
- "Syndicate Wars Port - a reverse-engineering tale". gynvael.coldwind.pl. Archived from the original on March 4, 2016.
- About Archived 2015-11-05 at the Wayback Machine "Syndicate Wars Port is a port of the 1996 DOS game Syndicate Wars to modern operating systems. In particular, it runs on GNU, Mac OS and Windows, but it should also work on any system supported by the SDL library on the i386 architecture."
- The-Great-Escape Archived 2016-07-21 at the Wayback Machine on github.com/dpt
- The Great Escape Archived 2016-04-17 at the Wayback Machine slides by David Thomas
- TheLastNinja Archived 2016-02-24 at the Wayback Machine on github.com
- Orland, Kyle (May 6, 2020). "Beyond emulation: The massive effort to reverse-engineer N64 source code". Ars Technica. Retrieved November 26, 2021.
- Decompiled Tomb Raider Source Code Reveals Loads Of Vulgar Words (NSFW) by Logan Booker on kotaku.com (2018-02-17)
- TOMB5 on GitHub
- decompiling_the_original_tomb_raider_games on reddit.com
- ReC98 Archived 2016-08-29 at the Wayback Machine on github.com
- "PyTouhou". pytouhou.linkmauve.fr. Archived from the original on April 8, 2020.
- "OpenTTD 0.1.1". SourceForge page about OpenTTD. Archived from the original on 2010-07-02. Retrieved 2009-12-11.
- "TTDPatch origin". Transport Tycoon Forums. Archived from the original on 2011-09-27. Retrieved 2009-12-11.
- u3history Archived 2015-01-20 at the Wayback Machine on sven.50webs.org
- "Decompiled Undertale RPG Source Code Released on GitHub". BleepingComputer.
- Oric Game remakes Archived 2016-07-21 at the Wayback Machine on jotd.pagesperso-orange.fr "I have written a set of tools to convert BASIC and asm code to C and assemble them together. I have used them over the years to convert a few games. Some conversions get some enhancements, some not."
- HouseOfDeath_dev.zip Archived 2016-07-21 at the Wayback Machine on jotd.pagesperso-orange.fr
- L'Aigle d'Or Archived 2016-07-21 at the Wayback Machine on pyra-handheld.com by ptitSeb (Dec 20, 2014)
- ZZT's source code has been reconstructed - Reconstruction of ZZT is a game-changer for the ZZT community on retronauts.com by Stuart Gipp (March 17, 2020)
- From The Past To The Future: Tim Sweeney Talks by Benj Edwards on Gamasutra "[...]if you still have those disks. TS: Sadly, I don't. It just didn't seem important. Yeah, that's the tragedy. I don't have the ZZT source code either. I wish I'd saved it all." (May 25, 2009)
- zzt on epicgames.com "Please don't ask for the source; if I had it, I'd release it, but I lost it in a crash a long time ago." (1997)
- license.txt on github.com/asiekierka/reconstruction-of-zzt
- reconstruction-of-zzt on github.com
- Game Source Code Collection at the Internet Archive
- Liberated Games, specialized on open sourced computer games (archived; from 2015-07-26)
- Open Source Game Clones, specialized in open source variants of commercial games