Turn 10 Studios

Located in Redmond, Washington, Turn 10 Studios is the creator of the Forza Motorsport franchise. Turn 10 is a subdivision of Microsoft Studios, established in 2001 as a first-party racing game developer. Turn 10 Studios began working on the original Forza Motorsport to fill the void of simulation racing games on the Xbox console. With an emphasis on driving mechanics and the newest features of Xbox LIVE, the original Forza Motorsport was released in May of 2005 to much critical acclaim and community support.

Source : IGDB