reimbursed for his work on a port of Space Invaders. He co-founded the company Imagic in 1981 and began developing Demon Attack. It was the first game he developed that had a graphic artist, Michael Becker, who created eight-phase animations for the demons. Upon the game's release in 1982, it received positive critical attention for its graphics and gameplay and became one of the best-selling Atari 2600 games, and the best-selling game developed by Imagic.

Programmer Gary Kato created a port of