Oct 22, 2010 19:51 GMT  ·  By

Red Dead Redemption will soon get some new downloadable content in the form of the Undead Nightmare pack, and Rockstar, the publisher, has just revealed the achievements that will be packed in the DLC, and a trailer of the new multiplayer mode introduced by it.

Red Dead Redemption, the surprisingly popular Western title that captured a huge amount of gamers this spring, will get one of its last pieces of downloadable content in the form of the Undead Nightmare pack.

The new DLC will introduce a new type of enemies, in the form of zombies, which have invaded the game world, and its protagonist, John Marston, will need to kill them off and find a cure for the outbreak.

Now, before the DLC will be released next week, Rockstar has revealed the 12 new achievements and trophies that will be added to the Xbox 360 and PlayStation 3 versions of Red Dead Redemption.

KINGPIN Fight off 8 unique players during your reign on top during Land Grab in Free Roam.

MAD MARSTON: THE TRAIL WARRIOR Attain Rank 5 in all Undead Challenges.

SMOKE THAT SKINWAGON Make it to wave 15 in Undead Overrun Gametype in Multiplayer.

SPINNING PLATES Have every territory saved at the same time during the Undead Nightmare.

ZED'S DEAD, BABY Attain 100% Game Completion in Undead Nightmare.

Besides the new achievements and trophies, the Undead Nightmare pack will also introduce a new multiplayer mode, called Undead Overrun, which is basically a rehash of the Nazi Zombies mode from Call of Duty: World at War.

Simply put, two to four players will be faced with waves of zombies and need to survive for as much as possible before being overrun.

As opposed to the mode from World at War, you can roam the game map while fending off the undead, as the Call of Duty title forced players to sit in a single building.

Check out the new Undead Overrun mode in the surprisingly poetic trailer below.