Single Player, Xbox LIVE Multiplayer 2-4, Local Multiplayer 2-4, HD (High Definition). Ready to start down the road to excellent mental fitness? Upgrade to the full version of Brain Challenge to unlock twenty different mini-games in five brain-building categories. Daily exercises challenge you to increase your mental capacity: they never repeat, and the better you do, the harder they get! Challenge your brain, monitor your progress, and watch your mental capacity grow! This game requires the Xbox 360 hard drive or the 512MB Memory Unit for storage. There are no refunds for this item. For more information, see www.xbox.com/live/accounts.