He designed a series of pure action games using black and white vector graphics.
After leaving Cinematronics, he worked briefly for Gremlin before becoming an independent contractor with Gottlieb.
[3][4] 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.
[5] Skelly also designed two other games for Gottlieb, Insector and Screw Loose, which were never released.
[7] When Sega moved most of the development of Sonic the Hedgehog 2 to North America, Skelly joined the team and assisted with art and design of the game.