Zombies mode was introduced into the Wii U version, due to data limitations it might have if it were released on the Wii. The game play has been enhanced majorly such as using the modified Multiplayer engine to hold more capacity and other abilities, like Theater mode and being able to hold maps that enable players to fight each other. Grief mode is introduced, and later, Turned, which both involve players going against each other. Zombies mode returns in Black Ops II, featuring Green Run, which includes three sub-maps, being Town, Farm, and Bus Depot, as well as three game modes, being TranZit, Survival, and Grief modes.