Rockstar Games announced Undead Nightmare Pack for Dead Red Redemption will be available on October 26, at both Xbox Live and PlayStation Network at a price of 800 Microsoft Points and $9.99, respectively. You can see its trailer here.
"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 introduce hours of fun with a new single-player story, new multiplayer content. Apparently the overnight, a zombie plague rages on the border, decimating the landscape and waking the dead. In the cities, settlements and outposts throughout the world, uninfected citizens struggling to survive against waves of undead. John Marston will ride in the vast and terrifying world and survive long enough to find a cure.
I think for about $10 on Xbox 360 and PS3 it will give you 5–12 hours worth of zombie-shooting.