Red Dead Redemption is a Western epic, set at the turn of the 20th century when the lawless and chaotic badlands began to give way to the expanding reach of government and the spread of the Industrial Age.

Red Dead Redemption recreates the American West at the turn of the 20th century: a violent and turbulent time of rapid growth and change. Players become the partially reformed outlaw John Marston; blackmailed by the government, his family threatened as he is forced to traverse the vast and unforgiving expanses of the Western frontier in search of members of his former gang. In a dangerous world full of opportunistic criminals, corrupt officials and settlers battling the elements in a struggle to survive, Marston’s journey takes him from the dusty and lawless frontier to the civilized towns of the North, and down into a Mexico on the brink of a full-scale civil war.

Utilizing Rockstar's proprietary Rockstar Advanced Game Engine (RAGE), Red Dead Redemption features an open-world environment for players to explore, including frontier towns, rolling prairies teeming with wildlife, and perilous mountain passes - each packed with an endless flow of varied distractions. Along the way, players will experience the heat of gunfights and battles, meet a host of unique characters, struggle against the harshness of one of the world’s last remaining wildernesses, and ultimately pick their own precarious path through an epic story about the death of the Wild West and the gunslingers that inhabited it.

"Undead Nightmare turns the world of Red Dead Redemption upside down," said Sam Houser, founder of Rockstar Games. "The supernatural vibe and the return of some favorite characters create a whole new game inside an already incredible world."

Undead Nightmare introduces hours of a new single-player storyline and brand new multiplayer content.  Seemingly overnight, a zombie plague ravages the once bountiful frontier, decimating the landscape and reawakening the dead. In towns, settlements and outposts throughout the world, the uninfected citizens are left to fight for survival against waves of the undead.  John Marston must ride out into the vast and terrifying world and survive long enough to find a cure.

Four zombie classes enter the fray, each possessing unique characteristics, attacks, and defenses.  Mythical creatures roam the frontier, alongside zombie cougars, bears, wolves and many more.  Taking down the undead requires non-traditional weaponry, including the new Blunderbuss, which can be loaded with looted remains of fallen zombies.  The deadly Tomahawk and the Explosive Rifle make a triumphant comeback and will be available exclusively for those who downloaded the Legends and Killers Pack and the Liars and Cheats Pack.

The all new single-player narrative features new challenges, quests, and ambient events, including Missing Persons, where the player must find a missing survivor lost amongst the throngs of undead. New competitive multiplayer and multiplayer free roam content includes Undead Overrun, a brand new multiplayer survival mode where waves of infected attack and players must work together to stay alive against increasingly difficult odds.

Also coming soon, Undead Nightmare, a single, stand-alone disc that bundles together for the first time ever, the Undead Nightmare Pack, the Outlaws to the End Co-Op Mission Pack, the Legends and Killers Pack, the Liars and Cheats Pack and all the Multiplayer Free Roam modes released to date.  Undead Nightmare will be available at retail stores everywhere for $29.99/£24.99/€29.99 and does not require a copy of Red Dead Redemption to play.    

The Undead Nightmare Pack will be available on October 26, 2010 from Xbox LIVE (800 Microsoft Points) and PlayStation Network ($9.99/£7.99/€9.99) and requires a copy of Red Dead Redemption to play.