Sirius Software was a California-based publisher of video games for the Apple II, Atari 8-bit computers, Commodore 64, and VIC-20. Most games were written for the Apple II, then ported to other systems. The company was founded in 1980 by Jerry Jewell and Terry Bradley and released over 160 games before folding in 1984. Sirius also developed games for the Atari 2600 which were published in 1982 and 1983 by 20th Century Fox Video Games. Fox's failure to pay Sirius resulted in company's downfall. Nasir Gebelli wrote some of the early hits from Sirius, establishing his reputation as an Apple II game programmer.