Escalation features four new multiplayer maps and an unprecedented Zombie experience, including famed director George A. Romero, Robert Englund, Sarah Michelle Gellar, Michael Rooker and Danny Trejo, as well as an original music track from Avenged Sevenfold titled "Not Ready to Die."
The Escalation content pack's new multiplayer maps include:

 "Hotel," where players battle it out on the roof of a Cuban luxury hotel and casino against the vivid backdrop of old Havana
 "Convoy," which delivers intense, close-quarters combat at the scene of an ambushed U.S. military convoy
 "Zoo," which sets gamers on an eerie ride through an abandoned Soviet Russian Zoo with danger at every turn
 "Stockpile," which pits players in a remote Russian farm town, housing secret WMD facilities
 "Call of the Dead," Escalation'sZombie experience that assembles a zombie-carnage dream team to fight against a new and undefeatable zombie horde menace, all set in the dark, ice-covered isles of Siberia

"For the millions of dedicated fans playing Black Ops each and every day online around the world, we crafted for them unique multiplayer maps and experiences with Escalation, that will allow PS3 players to continue enjoying the game for a long time to come," said Treyarch Studio Head, Mark Lamia. "And with Call of the Dead, we went all out to give our loyal Zombie fans a totally new creative to enjoy, that pays homage to some of the greatest horror films that have inspired us all."