Work on the Retribution Engine was begun by Andrew Gardner in 1997, inspired by games such as Doom and Quake and also John Bradley’s ‘Tumbling Tie-Fighter’ demo program. The original aim was to create a game titled Corridors of Power. The first public release of the game occurred in March 1999 and consisted of a simple two-level demo of the game. The game and engine were regularly updated and generated much interest. The biggest comment was that game designers would like to use the engine to make their own levels and so Paul Moxon joined the project to develop a level editor in October 2000.