This is a mod for Deus Ex. Deus Ex: Revision is a mod that adds to the base game and refurbishes the game by adding new elements in it. It has been endorsed by the developers of Deus Ex and is highly worth checking out now. The thing about this mod is that it implements new patches and fixes the problems that the GOTY version had, especially since the Steam GOTY version of Deus Ex is known for its poor implementation of newer OSes. However, this mod brings in and adds not only patches, but new textures, maps and models for people who want to experience the game but from a new perspective with it's new gamemodes, and for people who find the visuals of the original to be a bit outdated.