Racing sim from Microsoft, targeted at gamers who are passionate about cars and racing. 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. Features car models from more than 60 top car manufacturers, customization via decals and team paint-schemes, and vehicle tuning that really affects performance.