The Chaos Engine is a top-down run and gun video game developed by The Bitmap Brothers and published by Renegade Software in March 1993. The game is set in a steampunk Victorian age in which one or two players must battle the hostile creations of the eponymous Chaos Engine across four landscapes and ultimately defeat it and its deranged inventor.

Atari ST is a line of personal computers from Atari Corporation and the successor to the company's 8-bit home computers. The initial model, the Atari 520ST, had limited release in April–June 1985, and it was widely available in July. The ST was the first personal computer with a bitmapped color graphical user interface, using a version of Digital Research's GEM interface / operating system, from February 1985.