Single Player, Xbox Live Multiplayer 1-2, 5.1 Surround Sound, HD (High Definition). Buy Assault Heroes - the ultimate arcade shooter! Destroy an underground lab filled with deadly contents. Blast your way through enemy-infested territory. Take out choppers, boats, tanks, and monstrous weapons of doom with your heavily armed 4x4 and speedboat. Battle alone or with a comrade in online co-op. Buy the full game now and unlock guaranteed nonstop action! There are no refunds for this item. For more information, see www.xbox.com/live/accounts.