This trailer shows off the zombie mode in Call of Duty: Black Ops 2, as the undead are now an expected part of Treyarch's installments in the Call of Duty series of military shooters. Word is those who preorder the Hardened or Care Package version of the game's Collector's Editions will receive the exclusive Nuketown Zombies map, but there is only a standard edition for PC users, and this map is a preorder bonus for that as well.