Microsoft's premiere driving simulation series revs up with its second high-definition release for Xbox 360, Forza Motorsport 3. The third in the series enhances or improves upon nearly all the key features of earlier games, while adding new driver-assisting functions to make play more accessible to a wider audience. Central to Forza 3 are detailed, virtual re-creations of more than 400 models of automobile, from 50 different manufacturers. Races may be run on more than 100 tracks, including old favorites and some new to the series, based on actual locations around the world. Graphically, the cars are built from over ten times the number of polygons used to create the cars in Forza 2. The game's physics model refines the systems used in the previous game, and developers worked with other driving-game experts as well as with representatives of several auto manufacturers, in their efforts to build-in authentic cause-and-effect elements in minute detail.