Grand Prize: Red Dead Redemption™ War Chest Package Includes:
Xbox 360® Arcade video game and entertainment system Pelican™ 1510 Carry On Case Turtle Beach® Ear Force® X31 Wireless Digital Xbox 360 Headset with Xbox 360 Live Chat & Stereo Sound Monster® Gamelink Component Cable for Xbox 360 (30 grand prizes )
To enter you must be a Reward Zone member – just go get one from Best Buy (it's free). Use the card to create an account at https://www.myrewardzone.bestbuy.com and go to the Reward Zone Gamer's Club and then to Special Offers and enter. I think you have to enter every day, but you might only have to once.