From Microsoft Game Studios:
Motocross Madness combines stunt racing with the daredevil spirit of world-class motorbike racing. Unique to this game is a rider and bike physics model that gives the user control over the throttle, brake, steering, and gears on the bike, and over the center of gravity, which can be moved forward, backward, or to either side. Motocross Madness also offers a wide variety of racing and stunt environments, including 30 indoor and outdoor stadiums, a quarry, and long-distance Baja course. Additional features include a track editor, 16 midair stunts and jumps, and multiplayer support for up to 8 players.