: These titles expanded the scope with "buildables" (crafted equipment) and the GobbleGum system, which grants temporary specialized abilities.
: Iconic vending machines provide permanent (until downed) stat boosts, such as Juggernog for increased health and Speed Cola for faster reloading.
Call of Duty: Black Ops Zombies is a cooperative survival game mode that has evolved from a hidden bonus feature in 2008 into a central pillar of the Call of Duty franchise. Primarily developed by Treyarch, the mode tasks players with surviving endless waves of increasingly difficult undead while managing resources, uncovering complex "Easter Egg" storylines, and utilizing supernatural weaponry. Core Gameplay Mechanics
