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 are no Easter Eggs included within the Black Ops II maps (except for Nuketown Zombies).
There are a total of four Survival maps in Call of Duty: Black Ops II, three of which originating from the map Green Run, and one being a re-imagining of Call of Duty: Black Ops multiplayer map Nuketown.