Since the games release Rockstar have released 3 Paid Dowloadable packs: Legends and Killers, Liars and Cheats and Undead Nightmare.
Legends and Killers was released on August 10 2010 for 800 Microsoft Points. This pack adds nine new multiplayer locations, 8 new multiplayer characters from Red Dead Revolver, a Tomahawk and new achievements.
The second pack to be released was Liars and Cheats which was released September 21 2010 and costs 800 Microsoft Points. The new additions are "Stronghold" an Attack/Defend the Bases style gameplay, multiplayer Liars Dice and Poker, 15 new Characters, new gang hideouts and the Explosive Rifle.
The last paid DLC to be released was Undead Nightmare which was release on October 26 2010. This DLC introduced a new single player campaign. The campaign introduced Zombies, New Undead Animals and Mythical Creatures. Undead Nightmare also contains new weapons, Outfits, as well as 2 new Multiplayer Modes. These new multiplayer modes are called "Undead Overrun" which puts you and 3 others against hordes of zombies which you must fight off and "Land Grab" in which players fight for control of land in various Towns.
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