The Call of Duty: Black Ops map expansion, called “Escalation,” is now available to Xbox Live subscribers. Escalation adds five new maps, including four that are available in multiplayer mode. As we noted back when the expansion was announced, the maps include a Russian Zoo, a Cuban hotel and casino, a weapons of mass destruction stockpile, and “convoy.” If you still haven’t had your fill slaying the living dead, the update also includes a new zombie experience called “Call of the Dead.” The update is available for $15, 0r 1200 MS points. We’re definitely downloading this just as soon as we get back from covering BlackBerry World. Frag out!