FlatOut: Ultimate Carnage is the third game in the FlatOut demolition racing series, known earlier as FlatOut: Total Carnage. FlatOut: Ultimate Carnage was officially announced February 1, 2007, and was released on July 22, 2007 in Europe, on August 1, 2007 in Australia, and on October 2, 2007 in North America for the Xbox 360. The game is an enhanced port of FlatOut 2 featuring new gameplay modes and graphics as well as at least two new cars.
A demo for the Xbox 360 version was released on Xbox Live Marketplace on July 19, 2007. The Microsoft Windows version was released through the Steam network on August 26, 2008, and then in game stores on September 2. There is also a handheld version of the game for the PlayStation Portable called FlatOut: Head On, which was released in Australia on March 12, 2008, in Europe two days later, and in North America on April 4, 2008.