Tim Skelly (February 10, 1951 – death reported March 2, 2020) was a video game designer and game programmer who developed arcade games for Cinematronics from 1978 until 1981. He designed a series of pure action games using black and white vector graphics. One of his early games, Rip-Off, was the first arcade game with two-player cooperative play. Star Hawk, Rip-Off, Armor Attack, and Star Castle were all later ported to the Vectrex home system.
After leaving Cinematronics, he worked briefly for Gremlin before becoming an independent contractor with Gottlieb. His first game for Gottlieb was the esoteric Reactor, and he had it written into his contract that he would get a credit on the title screen for designing the game. 
Previously, programmers had occasionally sneaked their names into their games as easter eggs, and Berzerk designer Alan McNeil's signature was on every cabinet, but Reactor was the first coin-op to have the designer's name appear in-game with the manufacturer's blessing.
Skelly also designed two other games for Gottlieb, Insector and Screw Loose, which were never released. Later he worked for Incredible Technologies, then Microsoft Research. In 1983, a book of video game cartoons by Tim Skelly was published as Shoot the Robot, then Shoot Mom.
- Star Hawk
- Armor Attack
- Star Castle, designer-only
- War of the Worlds
- Kerr, Chris (March 3, 2020). "Obituary: Arcade game designer and programmer Tim Skelly has passed away". Gamasutra. Retrieved March 17, 2020.
- Hague, James. "Halcyon Days: Interviews with Classic Computer and Video Game Programmers".
- "Appendix A: Professional Experience of Panel Members". www.wtec.org.
- "Tim Skelly's list of works". www.arcade-history.com.
- "Tim Skelly's History of Cinematronics and Vectorbeam". dadgum.com.
- "Tim Skelly interview". www.westnet.com.
- Skelly, Tim (1983). Shoot the Robot, then Shoot Mom. Contemporary Books. ISBN 978-0809255412.
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