"Alien vs Predator" was initially developed entirely in-house by Rebellion in Oxford. Mike Beaton programmed the graphics engine, whilst the Kingsley brothers plus additional artists Stuart Wilson and Toby Harrison-Bamfield produced the artwork using the novel technique of photographing built models. During this time, Rebellion's development team was expanded to assist with work on additional projects, including artist Justin Rae and programmer Rob Dibley working on "Checkered Flag" for the Jaguar, and programmer Jane "Andrew" Whittaker to assist with programming the gameplay engine for "Alien vs Predator", which was jointly written by Beaton and Whittaker. "Alien vs Predator" was later scheduled for a Q2 1994 release, but the game's then-low budget caused multiple issues during development, leading it to be delayed for a holiday release on the same year for improvements. James Hampton acknowledged both "Wolfenstein 3D" and "Doom" as influences for the game, as he and Atari encouraged the development team to play games like them.