Call of Duty: World at War – Zombies was a first-person shooter video game developed by Ideaworks Game Studio, and published by Activision for iOS. It was a spin-off of the Call of Duty series, and based on the Zombies mode of Call of Duty: World at War. The game was released worldwide for iPhone on November 16, 2009, and for iPad on April 1, 2010. From Wikipedia