Activision has just released Call of Duty: World at War: Zombies.You want more Call of Duty in your life? Activision has just released the first official iPhone game in the franchise in the shape of Call of Duty: World at War: Zombies. This is the same zombie experience found in the console version of World at War, and it supports up to four players via either a local Wi-Fi connection, or full online play (Wi-Fi only, no 3G or EDGE support).