Gungriffon: Allied Strike (Xbox) (ONLINE ORDER ONLY)

GunGriffon takes place in a futuristic world where human factions fight for what's left of the earth's resources. As a renegade soldier, you are part of a group whose prime mission is to take down armored tanks. You'll have your own war machine, a "High Mac" (High-Mobility Armored Combat System) to help you fight ground machines and a battery of armed soldiers. This mech action game boasts full Xbox Live compatibility with a multiplayer online mode and a variety of intense missions.