About Forza Motorsport

From official site:
Are you passionate about cars and racing? Then, Forza Motorsport™ is your game. Own, customize, and race your favorite cars in the most technologically advanced and realistic driving sim yet.

Use race earnings to buy upgrades and aftermarket parts, so you can transform real production cars into high-performance racers. On the track, experience an impressively accurate simulation, while putting your performance-tuned creations to the test against the online gaming world on Xbox Live™.