Greenawalt said the game has been designed with a different vision in mind compared to Forza Motorsport 4 (and FM5, due to arrive next year), but both Turn 10 and Playground share the same desire to turn gamers into the next generation of car lovers (and vice versa). The new game will make use of bits of Forza Motorsport 4's physics engine, Greenawalt said, telling me that the active collaboration between Turn 10 and Playground will effectively give players the benefit of not one but two teams of developers.