For those who haven't picked up Red Dead Redemption, or aren't interested in its main singleplayer campaign, Rockstar will soon release a single disc that includes all of the downloadable content, playable without the main game.
"Undead Nightmare," taking its name from the game's latest DLC extension, will include that, the Outlaws to the End cooperative mission pack, the Legends and Killers, and Liars and Cheats extensions, plus all multiplayer Free Roam modes released so far. It'll cost $29.99 in the U.S., £24.99/€29.99 in Europe.
Again, it doesn't require a copy of Red Dead Redemption to play.
New Details on Red Dead Redemption's Undead Nightmare [Rockstar Games]