The story of Flatout Ultimate Carnage takes place on an open road, where players take on the role of a stunt driver competing in various racing challenges. The game is set in a fictional world with a mix of realistic and cartoon-like environments, adding to its over-the-top atmosphere.
The gameplay of Flatout Ultimate Carnage focuses on high-speed racing and stunts, with players able to perform aerial stunts, drift around corners, and smash into opponents. The game features a variety of cars, each with its own strengths and weaknesses, which can be upgraded and customized using in-game currency.