Order Halo 3: ODST and get $10 off a future video game purchase. The promotional code will be placed directly into your Amazon.com account within 2 business days after the product ships. Offer valid when shipped and sold by Amazon.com. This offer will be extended to all existing pre-orders. Limit 1 per household. Amazon reserves the right to change or terminate this promotion at any time.
Amazon.com: Halo 3: ODST: Xbox 360: Video Games
'Developed exclusively for Xbox 360 by acclaimed developer Bungie, Halo 3: ODST is a new game in the Halo saga that lets people experience events leading up to the epic story told in Halo 3 through the eyes of an ODST (Orbital Drop Shock Trooper), as they search for clues leading to the whereabouts of their scattered squad and the motivations behind the Covenant's invasion of New Mombasa. The release adds a new dimension to an all-encompassing universe that gamers around the world have known and loved for close to eight years. Halo 3: ODST also introduces Firefight, a new cooperative multiplayer* mode where up to four players can assume the role of an ODST squad and fight together to take on increasingly challenging waves of enemies. Also included are three new Halo 3 multiplayer maps on a 2nd standalone disc, which includes all original Halo 3 maps, as well as the Legendary, Heroic, and Mythic Map packs for a total of 24 maps. Halo 3: ODST is available for pre-order in both a standard package and a Halo 3: ODST Collector's Pack which includes the game and a new and exclusive Wireless Controller. Those that pre-order Halo 3: ODST at participating retailers worldwide will receive a token to unlock Sgt. Johnson as a playable character in Firefight.'
Halo 3: ODST $50.99 (comes with $10 credit!) at amazon FSSS 
