Single Player, Xbox LIVE Multiplayer 1, 5.1 Surround Sound, HD (High Definition). Upgrade now for 100 levels of pure, action-studded enjoyment from the makers of Llamatron and Tempest 2000. Collect powerups to activate Bonus Rounds and master the strategies necessary to maximize your score on every level! There are no refunds for this item. For more information, see www.xbox.com/live/accounts.