Survival is a Zombies game mode included in Call of Duty: Black Ops II. It is one of four modes of play in Zombies along with TranZit, Grief and Turned. In Call of Duty: World at War and Call of Duty: Zombies, it is the only mode of play in Zombies. In Call of Duty: Black Ops it is one of two game modes, along with Dead Ops Arcade.
The objective of Survival is to survive limitless waves of the undead, with limited wall weapons, the Mystery Box, Perk-a-Colas, and the Pack-a-Punch Machine, depending on the map. No Power Switch needs to be turned on in order to access the machines, and overall gameplay is quite simple. There is usually one Easter Egg per map in Black Ops There are no Easter Eggs included within the Black Ops 2 maps (except for Nuketown Zombies).