Uprising includes four multiplayer maps (Encore, Magma, Vertigo, and Studio), as well as a new Zombies offering called Mob of the Dead. This mode takes players to the iconic island prison of Alcatraz in San Francisco, California.

Mob of the Dead features four prohibition era mobsters played by Hollywood stars Ray Liotta (Goodfellas), Chazz Palminteri (The Usual Suspects), Joe Pantoliano (The Sopranos), and Michael Madsen (Reservoir Dogs).

The four are imprisoned at Alcatraz, though that is the least of their concerns. They plan to break out, but their plans are foiled by an onslaught of undead. Players will take on the zombies with guns, blunt instruments, and improvised weaponry throughout the island.

This is not the first time Activision has enlisted celebrities for a Call of Duty expansion. Action movie stars Robert Englund (Nightmare on Elm Street), Sarah Michelle Gellar (Buffy the Vampire Slayer), Michael Rooker (The Walking Dead), Danny Trejo (Machete), and George A. Romero (Night of the Living Dead) lent their voices and likenesses for use in the .

A new game element in Mob of the Dead is the Purgatory feature, which sends players to the afterlife when they are downed by a zombie.

Uprising is free for those who own the and will be available separately as a $15 download.