Activision has released a second Zombies title for Apple's iPhone, iPad and iPod Touch.
Call of Duty: Black Ops Zombies follows in the footsteps of last year's Call of Duty: World At War Zombies and recreates the popular multiplayer mode on iOS.
The game has been developed specifically for tablets and smartphones and features new maps and weapons, as well as 50 levels of the retro-style Dead-Ops Arcade.
Black Ops Zombies supports up to four players and even includes voice chat, allowing teammates to communicate with each other for the first time.
The game is priced at £4.99 and features Game Center functionality such as leaderboards and achievements.