Deus Ex: Revision is a mod for Deus Ex: Game of the Year Edition, developed by the Caustic Creative team; a multinational group of programmers. The mod was in development since 2007, and released in 2015, with the aim of giving a complete overhaul of the games' overall environment, graphics, soundtrack and gaming experience. Caustic Creative published Deus Ex: Revision in cooperation with Square Enix and Eidos Montreal, as it was made available for free on the Steam store to anyone who owns a Steam copy of Deus Ex: Game of the Year Edition.