In 1994 he started for a couple of months as the only employee working on a game which would later become the post-apocalyptic CRPG game "Fallout". He lay out the basic concept based on the GURPS system and began programming the isometric game engine. He also took over the producer role from Thomas R. Decker who had to supervise multiple other projects at the time. With a development cycle of three and a half years "Fallout" was released in 1997. During this time he was also a programming consultant on "Stonekeep" (1995) and helped out coding "" (1997).