This portable entry in the series continues THQ's long-line of motocross games, which have included the Ricky Carmichael series, MX Superfly, and the most recent MX vs. ATV Unleashed. MX vs. ATV Unleashed: On the Edge allows gamers to explore immense free-world areas, compete with an array of vehicle types and vie for off-road supremacy in a multitude of racing modes. The franchise's Rhythm Racing physics engine returns for realistic riding. PSP system multiplayer will allow four players to challenge each other wirelessly.