List of commercial video games with available source code

This is a list of commercial video games with available source code. The source code of these commercially developed and distributed video games is available to the public or the games' communities.

MotivationEdit

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.

DescriptionEdit

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.[1] 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.[2][3]
Barkley 2 2021 (Cancelled) ARPG Proprietary/CC BY-NC 4.0
(engine/game code)
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.[4]
Barotrauma 2017 Role-playing video game restrictive (only mods)[5] 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.[6][7] 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.[8]
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.[9]
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.[10]
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.[11][12][13][14]
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.[15] Weizenbaum's original MAD-SLIP implementation was re-written in Lisp by Bernie Cosell.[16][17] A BASIC version appeared in Creative Computing in 1977, written in 1973 by Jeff Shrager.[18] 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.[19] 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.[20][21][22]
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[23] 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,[24][25] iPhone App Store[26] and BlackBerry App World[27] as the game assets were kept proprietary.[28]
HyperRogue 2011 Roguelike GPLv2+ Proprietary Zeno Rogue Released in 2011 on GitHub[29] as open-source non-Euclidean roguelike, it was commercialized in 2015 on Steam and other distributors.[30]
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 FURY set to 1.[31]
Jagged Alliance 2 Wildfire (now JA2-Stracciatella[32]) 2004 Tactical role-playing game Own license Proprietary iDeal Games Source code was bundled and released with JA2: Wildfire 2004.[33] The JA: Unfinished Business source code became later available too.[34]
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.[35] Like the games before, public domain software and hosted on GitHub.[36]
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".[37][38][39] 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.[40]
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.[41]
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.[42]
Santa Paravia en Fiumaccio 1978 turn-based strategy Public domain software Public domain George Blank The game by George Blank[43] first appeared in the December 1978 issue of SoftSide magazine as BASIC listing.[44] 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.[45] It has been translated into many programming languages, such as ANSI C,[46] 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.[47] The game was released by On-Line Systems and became later the base for Leisure Suit Larry 1.[48] The PC version was also released later as freeware by Al Lowe.[49][50][51]
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.[52] While this was the first source code opened for a Night Dive Studios Studio's game, it was announced more will follow,[53] for instance for System Shock 1.[54]
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.[55][56]
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.[57][58]
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.[59] The Castle Doctrine was developed as an early access game and is now sold on Steam for $14.99.[60]
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.[61] Source rediscovered in 2011.[62]
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.[63]
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.[64]
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.[65] After 2001 development had ended, Clive Crous continued Falcon's Eye as Vulture's Eye.[65][66] 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[67] and successfully released on Steam in January 2016.[68]
Wargroove 2019 Turn-based tactics Apache-2.0 Proprietary Chucklefish Halley, the custom engine made for Wargroove,[69] has been available on GitHub to the public at least since 2018.[70]
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.[71][72][73][12][13][14]
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.[74][75]

Games with later released source codeEdit

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.[76]

   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.[77]
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.[78][79]
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.[80]
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.[81][82]
Airforce Delta 2000 2020 Flight simulator Climax Studios Source code of the Game Boy Color version was leaked on 4chan in May 2020.[83]
Aliens versus Predator 2 2001 2002 FPS Monolith Productions Source code released on the Monolith Productions FTP server in 2002, then quickly taken down.[84]
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.[85][86] Ports for modern FPGAs were made later.[87]
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.[88][89]
Aztec 1982 2019 Action-adventure Datamost In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.[90]
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.[91]
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.[92]
The Bilestoad 1982 2019 Action-adventure Datamost In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.[90][93]
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.[94] Using the code as reference, a reverse engineered build of the final version was created by Alexander Makarov for source ports around 2017.[95]
Blood & Magic 1996 2021 Real-time strategy Tachyon Studios Source code was uploaded to archive.org in 2021.[96]
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.[97]
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.[98]
California Watersports 2001 2020 Sports Theyer GFX The PlayStation source code was released in 2020 with the permission of developer Mark Theyer.[99]
Captain Comic 1988 2012 Platformer Michael Denio In September 2012 the source code of the NES version was offered on eBay for $439.[100][101]
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.[102][103]
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. [104]
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.[105]
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.[106]
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.[107]
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.[108] In late April 2010, a user on the Dreamcast Talk forum disassembled the contents of a Dreamcast development kit he had purchased.[109] Later, significant updates for the Dark Engine-based games were published.[110][111][112]
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.[113][114] 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.[115]
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.[116]
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),[117] and was discussed there by the original developer, Landon Dyer.[118]
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.[119][120]
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.[121] This code was continually modified, being passed around from person to person and ported to other system e.g. to VAX/VMS OS.[122]
Eve Online 2003 2011 Space strategy MMO CCP Games On 20 May 2011 someone released the EVE Online source code on a GitHub repository.[123] After the source code was online four days, CCP issued a DMCA take-down request which was followed by GitHub.[124]
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.[125]
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.[126]
Falcon 4.0 1998 2000 Combat flight simulator MicroProse A 2000 source code leak[127] 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.[128]
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.[129]
FIFA 97 1996 1996 sport video game Electronic Arts Around 1996 Electronic Arts accidentally put the game's source code on a demo disc.[130][131]
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.[132] The game's community took up the game and kept updating and porting the game via a GitHub repository under a GPL license.[133][134]
GunZ: The Duel 2005 2011 Third-person shooter MAIET Entertainment In 2011 the source code of GunZ 1.5 became available online.[135]
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.[106]
Hägar the Horrible 1992 2021 Platform Kingsoft Source code for the Commodore 64 version was uploaded to archive.org in 2021.[136]
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.[137]
Harry Potter and the Chamber of Secrets (PC) 2002 2020 Action-adventure KnowWonder Source code from a prototype version was leaked in 2020.[138]
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.[139][140]
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.[141]
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.[142]
Killer7 2005 2016 Action-adventure game Grasshopper Manufacture Sources and assets from the GameCube game were found in October 2016 on an open webserver.[143]
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.[144][145]
Mad Planets 1983 2021 Multidirectional shooter Gottlieb Uploaded to the Internet Archive by Jason Scott on 20 May 2021.[146]
Metal Arms: Glitch in the System 2003 2019 Third-person shooter Sierra Entertainment Uploaded to archive.org in 2019.[147]
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.[148]
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.[149][150]
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.[151][152]
Monsters, Inc. 2001 2019 Platform Kodiak Interactive Source code and artwork for the PlayStation 2 version was uploaded to archive.org in 2019.[153]
Mr Nutz 2 1994 2008 Platformer Ocean Software Amiga game, source code prototype associated with Peter Thierolf.[154][155]
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.[90]
The Muppets on the Go! 1996 2017 Educational Climax Studios Source code found on a backup disc, among art assets and more.[156]
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.[157]
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.[158]
Ninja Hattori-kun 1986 2019 Platformer Hudson Soft Uploaded to GitHub on December 24, 2019.[159]
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.[160]
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.[161]
Pac-Man 1982 2019 Maze Roklan Corp. In August 2019 the source code for the Atari 8-bit version was released by Kevin Savetz.[162][163]
Pesterminator: The Western Exterminator 1990 2019 side-scrolling Color Dreams In November 2019 the NES source code was uploaded to the Internet Archive.[164]
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.[165]
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.[166]
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.[167]
Ragnarok Online 2 2007 2014 MMORPG Gravity Posted on a forum found through unknown means.[168]
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.[169]
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.[170][171] The game community works since then on fan patches and source ports to new platforms like Linux, MacOS and OpenPandora.[172][173][174]
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.[175]
Rolling Thunder 1987 2016 side-scrolling action game Tiertex Design Studios The Amiga version became available on a community forum.[176]
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.[177] 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.[178]
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.[179] The successor's engine, X-ray 1.6.02, became available too.[180][181] 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.[182]
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.[183]
Star Trek: New Worlds 2000 2021 Real-time strategy Binary Asylum Source code from a prototype build was uploaded to archive.org in 2021.[184]
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.[157] 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.[185] 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.[186]
Swashbuckler 1982 2019 Fighting Datamost In January 2019 Jason Scott uploaded the source code of this game to the Internet Archive.[90]
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.[105] 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.[187][188]
Tomb Raider II 1997 2021 Action-adventure game Core Design Source code was released on archive.org in 2021.[189]
Tony Hawk's Underground 2003 2016 Sports game Neversoft The game's C++ source code was leaked in February 2016 to GitHub.[190]
Turrican III 1994 2008 Run and gun Factor 5 Amiga game, source code prototype associated with Peter Thierolf.[155]
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.[191][192][193]
Trespasser 1998 200x Action-adventure, FPS DreamWorks Interactive The fan community got the original source code into hand by unknown means[194] and created modifications and unofficial patches with it,[195][196] the latest DirectX 9 port from 2016 and the development ongoing.[197]
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.[198]
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.[199][200]
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.[201]
Urban Assault 1998 2016 Real-time strategy TerraTools Found on eBay.[202]
Warcraft II: The Dark Saga 1997 2020 Real-time strategy Blizzard Entertainment Source code for the PlayStation version was uploaded to archive.org.[203]
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.[204] Later most other parts of the series followed.[205][206]
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.[106]
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.[207]
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.[208][209][210] On May 5, 2020, the Massachusetts Institute of Technology uploaded to GitHub the source code for a 1977 version of Zork.[211]

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.[212][213][214][215][216][217][218] 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.[219][220]

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 [1] 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.[221][222] The community still updates this recompiled version and released also Windows and Linux builds in 2015,[223] source code available on GitHub under MIT.[224]
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.[225][226]
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.[227]
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,[228][229] like the OpenPandora handheld.[230]
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.[231][232] 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.[233]
The Castles of Dr. Creep 1984 (C64) 2010 Platform game Edward R. Hobbs [2] Robert Crossfield worked on a faithful engine for the game since 2010.[234] The remake/reconstructed version got released for PC on Steam by Edward R. Hobbs & Robert Crossfield in September 2016.[235]
Cannon Fodder 1993 (DOS) 2015 top-down shooter Sensible Software [3] 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.[236][237]
Chasm: The Rift 1997 (DOS) 2016 First-person shooter Action Forms [4] Around 2016 a reverse engineered version became available on GitHub.[238]
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.[239]
Commander Keen 5 1991 (DOS) 2017 Sidecrolling shooter Id software [5] In 2017 a pixel-accuracy aiming engine re-implementation, based on several disassembly/decompilation efforts, became available by David Gow.[240] C99 source code is hosted on GitHub under GPLv2. Originally only meant for Keen 5, it now supports Keen 4, 5 and 6.[241]
Diablo 1996 (Windows) 2018 Action RPG Blizzard Entertainment [6] In 2018 a reverse engineered version was released, based on previously accidentally released debug information and builds by Diablo developers.[242] 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.[243][244]
Digger 1983 1998 Arcade Windmill Software [7] Reverse engineered by Andrew Jenner in 1998, called Digger Remastered, released as GPL and ported for many platforms.[245]
Driver 2 2000 (PS) 2020 Driving Reflections Interactive In 2020 a reverse engineered version was released, based on previously accidentally released debug symbols.[246]
Dune II 1992 (Windows) 2009 Real-time strategy game Westwood Studios In 2009 a group started reverse engineering Dune II under the name OpenDUNE.[247] The resulting code was released under GPLv2 and ported to other platforms like the Pandora.[248]
Dungeon Keeper 1997 2005 realtime dungeon simulator Bullfrog Tomasz Lis reverse engineered a version called "KeeperFX", the resulting source code is released as GPLv3.[249] After developer Lis stopped working on "KeeperFX" around 2016 the community took up the work in 2019 and continues the project as "KeeperFX Unofficial".[250]
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.[251][252] In 2014 Christophe Fontanel released another reverse engineering project which tries to recreate all existing versions.[253][254]
E.T. the Extra-Terrestrial 1982 (Atari) 2006 Arcade Atari In 2006 decompiled by Dennis Debro.[255][256][257] Following that, several unofficial fixes for the game were released by a fan site.[258]
Elite 1984 (BBC Micro) 2003 Space trading game Ian Bell, David Braben [8] 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.[259] In September 2014, on Elite's 30th birthday, Ian Bell blessed Elite: The New Kind and re-released it for free on his website.[260][261][262] Source code of the 1.0 version is available on a GitHub repository.[263]
Escape from Colditz 1991 (Amiga) 2009 Action-adventure game Mike Halsall, John Law / Digital Magic Software. [9] Around 2009 some developers reconstructed from the Amiga version a C version under GPLv3.[264][265] 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.[266] Later author Peter Irvin blessed also the non-commercial redistribution of the Amiga version of the game.[267]
Freeway 1981 (Atari) 19?? Arcade game Activision Decompiled and commented by Rebecca Heineman.[257]
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.[268] The remake has since been ported to the GP2X[269] and Google Android.
Frontier: Elite 2 1993 2006 Space trading game Frontier Developments Reverse engineered to C by Tom Morton until 2006.[270]
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,[271] but this never happened.[272] In response, in October 2005 the game was reverse engineered by John Jordan and builds for modern operation systems were provided.[273] Updated until December 1, 2009 and later continued by other programmers with builds like "FFE_D3D".[274]
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.[275] Source code available at GitHub.[276] It was hit with a DMCA takedown on February 20, 2021.[277]
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.[278][279][276] It was hit with a DMCA takedown on February 20.[277]
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.[280] The Goldsrc engine and its other components were reverse engineered in context of the Xash3d project.[281] Ports to other systems became available, for instance Android or the OpenPandora.[282]
Inner Worlds 1996 (DOS) 2016 Fantasy adventure platformer Sleepless Software [10] Originally shareware, in February 2000 the game was released as freeware in version 1.3.[283][284] Source code reverse engineered around 2016.[285]
Igor: Objective Uikokahonia 1994 (DOS) 2017 Point and click adventure Pendulo Studios [11] Reverse engineered by Gregory Montoir, now hosted on GitHub, currently beta status.[286]
Heart of the Alien 1994 (Sega CD) 2004 Platformer Interplay Entertainment [12] 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.[287] The extracted source code was made open-source and is hosted freely available on SourceForge.
Jet Set Willy 1984 (ZX) 2014 Platformer Software Projects [13] This classic ZX Spectrum game was disassembled by Richard Dymond back into Z80 source code, and includes some very comprehensive comments.[288]
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,[289] for instance Windows, Linux and the OpenPandora handheld.[290]
Kid Chameleon 1992 (Genesis) Platformer Sega Technical Institute [14] Game disassembled by Sonic fan site Sonic Retro.[291]
KKnD Extreme 1997 (Windows) 2017 Real-time strategy Beam Software [15] Reverse engineered and made available on GitHub by Alexandr Parshin.[292]
Little Big Adventure 1994 (Windows) 2004[293] Action-adventure Adeline Software International [16] Reverse engineered after getting an "OK" by Frederick Raynal and placed on SourceForge (later GitHub) as "Twin-e".[294][295]
Manic Miner 1983 (ZX) 2014 Platformer Bug-Byte [17] This classic ZX Spectrum game was disassembled by Richard Dymond back into Z80 source code, and includes some very comprehensive comments.[296]
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.[297]
Metroid 1986 (NES) ? Run and gun/Action-adventure game Nintendo [18] 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.[298][299]
Might and Magic 6/7/8 1998 (Windows) 2016 RPG New World Computing [19] Reverse engineered as world-of-might-and-magic on GitHub by Alexandr Parshin and other programmers.[300]
Minecraft 2009 (Windows) 2010 Sandbox game Mojang The Mod Coder Pack (MCP)[301] 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.[302]
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.[303] The source code was made in 2017 available on GitHub for some time, before the repository was set to private.[304]
Oo-Topos 1982 (Apple II) 2015 Interactive fiction Penguin Software [20] Penguin Software released several of their Comprehend Adventure engine games as freeware, also from the Transylvania series.[305] After end of official support, Ryan Mallon reconstructed around July 2015 a source code variant of the game's engine to port these games.[306] Ryan Mallon works also on reverse engineering The Lost Vikings engine.[307]
Out Run 1986 (Genesis) 2012 Arcade racing Sega [21] Since around 2009[308] 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.[309] Ports to many systems followed, like OpenPandora.[310]
Pokémon Red and Pokémon Blue 1996 (GBC) 2014 Role-playing video games Nintendo [22] Reverse engineered assembly of the Game Boy Color game on github.com.[311]
Pokémon Crystal 2001 (GBC) 2014 Role-playing video games Nintendo [23] Reverse engineered assembly of the Game Boy Color game on github.com.[312]
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.[313][314][315]
RollerCoaster Tycoon 2 2002 (Windows) 2014 Business simulation game Chris Sawyer [24] 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.[316] Hosted as GPLv3 licensed open-source software on GitHub, it requires the original game's graphics and sound assets.[317]
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.[318][319] In May 2015 publisher Night Dive Studios acquired the game rights,[319] Villarreal and Night Dive Studios working on a digital distribution re-release.[320] On January 2, 2017, Kaiser released the source code of his reverse engineered engine under the GPLv3 license on GitHub.[321][322]
2019 (PC version) [25] In November 2019 a reverse engineered port of the DOS version of Powerslave was released.[323] The source code was released under the GPLv2 license.[324]
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 [26] In January 2021, the games' 2013 remasters were decompiled, with the code released on GitHub.[325]
Snipes 1983 (DOS) 2016 early networked Multi player game maze game SuperSet Software [27] 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[326] to make it public. The full C/C++ source code is available at GitHub.[327]
Super Bomberman 1993 (SNES) 2015 Action, Maze Hudson Soft [28] 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.[328]
Super Mario Bros 1985 (NES) 2012 Platformer Nintendo [29] Commented disassembly of SMB on GitHub.[329] A statically reverse engineered version, compiling and running with SDL was developed around 2017/2018.[330]
Super Mario Bros. 3 1988 (NES) 2017 Platformer Nintendo [30] Commented disassembly of SMB3 on GitHub.[331]
Space Ace 1984 (Apple IIGS) 2015 Interactive movie Advanced Microcomputer Systems [31] In July 2015 Rebecca Heineman released a reverse engineered Apple IIGS source code version on GitHub.[332][333]
Space Invaders 1978 2019 Arcade Taito [32] In December 2019 a C translation by Jason McSweeney was released on GitHub.[334]
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.[335][336][337]
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,[338] an unofficial version for the Pandora handheld and the ARM architecture became available in 2014.[339][340]
Stardew Valley 2016 2016 Farming simulation Eric "ConcernedApe" Barone [33] Decompiled for fan patches and mods.[341][342]
Star Wars Episode I: Racer 1999 2017 Arcade racing LucasArts [34] Reverse engineering of the code since 2017.[343] 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 [35] Since 2013, a recreation of the engine has been in development on GitHub.[344]
Strike Commander 1993 (DOS) 2013 Flight simulator Origin Systems [36] 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).[345][346]
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.[245]
Super 3D Noah's Ark 1994 (DOS) 2015 FPS Wisdom Tree [37] In October 2015 a community reconstructed, under usage of already released id software engine code, source code variant became available on Bitbucket.[347][348][349]
Super Mario 64 1996 (N64) 2019 Platform game Nintendo [38] In 2016,[350][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.[351] Their work was leaked on 4chan in June 2019 but it was finally released in late August of the same year.[352]
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.[353] It is complete beside networking and joystick code.[354]
The Great Escape 1986 (ZX) 2016 Arcade adventure Denton Designs [39] 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.[355][356]
The Last Ninja 1987 (Amiga) 2009 Action-adventure game System 3 [40] Robert Crossfield reverse engineered a faithful engine from the Amiga version of the game since 2009.[357] First three levels complete.
The Legend of Zelda: Ocarina of Time 1998 (Nintendo 64) 2021 Action-adventure game Nintendo EAD [41] 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.[358][failed verification]
Tomb Raider: Chronicles 2000 (PS) 2017 Action-adventure game Core Design [42] Around February 2017 PSX SDK tools and debug symbols leaked to a forum which ignited a reverse engineering project on GitHub.[359][360][361] Status, compiling.
Touhou Project (1 to 5) 1996 2014 Shoot 'em up Team Shanghai Alice [43] "The Touhou PC-98 Restoration Project" was started around 2014 on GitHub on base of found source code of libraries.[362] 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.[363]
Transport Tycoon Deluxe 1994 (DOS) 2004 Business simulation game Chris Sawyer/Microprose [44] 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.[364][365]
Ultima 3: Exodus 1983 2002 RPG Richard Garriott [45] Disassembled and ported to GBC in 2001 by Sven Carlberg.[366] 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.[367]
Zorgons Revenge 1983 (Oric) 2014 Shooter John Sinclair [46] Jean-François Fabre created binary translation libraries for Oric BASIC and assembly code to portable C and used it for nine games.[368] 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.[369] Build available for the OpenPandora.[370]
ZZT 1991 (DOS) 2020 Action-adventure, puzzle Tim Sweeney / Potomac Computer Systems [47] ZZT's source code got reconstructed by Adrian Siekierka in 2020.[371] 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[372][373]). The source code is released under a permissive license[374] on GitHub.[375]


See alsoEdit

ReferencesEdit

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  206. ^ "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.
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  214. ^ "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.
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External linksEdit