Fallout: New Vegas
is one of those games with a world you can get caught up in with all the things to do. You will have an opportunity to extend your stay in New Vegas, as Bethesda announced the first DLC titled, Dead Money. This DLC will be available for download come December 21st exclusively for the Xbox 360. This DLC will cost you 800 MSP, and will have you exploring New Vegas deeper than before.
Information on Dead Money straight from Bethesda's Blog:
As the victim of a raw deal you must work alongside three other captured wastelanders to recover the legendary treasure of the Sierra Madre Casino. In Dead Money, your life hangs in the balance as you face new terrain, foes, and choices. It is up to you how you play your cards in the quest to survive.