Call of Duty Zombies was born as an extra mode found on the COD:5 game for the Xbox, Playstation and PC. The game took off and essentially made a name for the otherwise 2nd place development team Treyarch. Trying to ride on the success of their newfound gametype, Activision has released an iPhone version of the game that strives to keep the experience as close to the original as it can. This means that weapons, levels and overall gameplay elements are identical. Nothing has been changed. In theory, this is a great concept but it is not without its flaws.