Ever since it first became a hit in World at War, the Zombie mode has been a common feature in the Call of Duty series, even re-appearing in AW as a special bonus round in Exo-Survival mode, with a full-on Zombie game set to appear in DLC. However, haven't these zombie modes just become a little played-out and boring by now? It was a fun idea for the first few games, but it's just become rather tired and predictable over the years. What the series needs is to keep creating wacky new mini-games for each title, much like what Infinity Ward did with Ghosts last year: the alien-centric Extinction mode was a nice change of pace while still retaining the core gameplay mechanics that made Zombies such a hit in the first place. Zombies are very much fashionable and in vogue at the moment, but market saturation is a dangerous thing. Though nobody buys these games just for the zombies, it'd be nice to come up with some slightly more imaginative mini-games for the sake of added value.