The Undead Nightmare Collection combines the Undead Nightmare Pack, Liars and Cheats Pack & Legends and Killers Pack.
Undead Nightmare Pack: An entirely new single-player campaign following John Marston as he tries to find a cure for the highly-infectious undead plague.
Liars and Cheats Pack: Multiplayer Poker, Liar's Dice, Horse Racing, Stronghold competitive mode and Explosive Rifle.
Legends and Killers Pack: Nine new map areas, Multiplayer Characters from Red Dead Revolver and Tomahawk weapon.
Important Information:
This is a purchase of Microsoft Points. You may redeem the Points for the content shown or for other content available on Xbox LIVE Marketplace. The number of Points required to redeem the content may change, and you may have unused Points after redemption.