This is the sequel to Halo. An alien race known as the Covenant comes to Earth to face Master Chief in this first person shooter. Halo 2 is set on Earth and allows you to battle against the invading alien force in different environments. Master Chief can make use of improved physics, new weapons and new vehicles. Multiplayer is now compatible with Xbox Live!, allowing gamers to take control of the Covenant Elites and fight from the other side against an incoming Spartan elimination squad.