Enemy Territory: Quake Wars is a first-person shooter video game developed by Splash Damage and published by Activision for Microsoft Windows, Linux, Mac OS X, PlayStation 3 and Xbox 360. The prequel to Quake II, Quake Wars is set in the same science fiction universe as Quake II and Quake 4, with a minimal back-story serving as a prequel to Quake II. It is the second multiplayer-focused game in the Quake series after Quake III Arena. Quake Wars features similar gameplay to Wolfenstein: Enemy Territory, but with the addition of controllable vehicles and aircraft as well as multiple AI deployables, asymmetric teams, much larger maps and the option of computer-controlled bot opponents. Unlike the previous Enemy Territory games, Quake Wars is a commercial release rather than a free download. Enemy Territory: Quake Wars received mostly positive reviews upon release, although it received some criticism on consoles.