Call of Duty: Black Ops - Escalation

Summary pulled directly from Steam - Some text may only be applicable to Steam platform

"Escalation", the second Call of Duty: Black Ops map pack, contains 5 all-new exceptionally varied maps; featuring 4 Multiplayer maps and an epic Black Ops Zombies experience with all-new playable characters.
In Multiplayer, battle it out in "Hotel", on the roof of a Cuban luxury hotel and casino against the vivid backdrop of old Havana; "Convoy" delivers intense, close-quarters combat at the scene of an ambushed US military convoy; "Zoo" takes you on a wild ride in an abandoned Soviet Russian Zoo, with danger at every turn; "Stockpile" pits players in a remote Russian farm town housing secret WMD facilities.
For Zombies fans, "Escalation" features a unique Zombies experience: “Call of the Dead”. Play as the zombie-killing dream-team of Sarah Michelle Gellar, Robert Englund, Michael Rooker, and Danny Trejo against a new and unnerving zombie menace. Set in a mysterious ice-covered remote Siberian island and inspired by legendary writer and director George A. Romero, a group of four fearless explorers fight for their lives amidst an army of bloodthirsty Russian zombies.