Get the award winning arcade game for only 560 points today only (I think it expires mid-day thursday.) Usually costs 1,200points, and is regarded as one of the best available.
Snippet from the xbox website
"Local Multiplayer 2-4, Xbox LIVE Multiplayer 2-4, HD (High Definition). Unlock the full version of Castle Crashers and start your journey into a world of magic and mystery! Battle your way across frozen tundras, deadly lava fields, and rival kingdoms in search of your kidnapped princess in this epic adventure. Eliminate your enemies with over 20 unlockable characters, 40 weapons to customize your hero with, and an arsenal of combos and magical attacks to choose from. Adventure together like never before - up to 4 can team up on the same console or over Xbox LIVE! 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 http://www.xbox.com/live/accounts."