Dead Rising 2

Sequel to easily one of the best Zombie games on the Xbox 360, Dead Rising 2 had a lot to live up to. The number of Zombies Dead Rising 2 shoves on the screen, similar to its predecessor, is simply overwhelming at times. The Leveling-up system which grants players new moves by killing more and more zombies just gives you another reason to beat the undead hell out of every single one of them on their feet. Combo-cards which can be found throughout the game make exploration interesting and most importantly allow players to combine weapons into super weapons that last longer, inflict more punishment and lend to a new experience. Also, the coop-mode lets you team up with your buddy and double team the Zombies. Deadly Weapons, addictive gameplay, replayability incentives and a great coop-mode make Dead Rising 2 a complete Zombie-fest in the perfect sense.

Stubbs the Zombie in Rebel Without a Pulse

One of the most accurate brain eating simulator on the Xbox 360(through Xbox Originals), the game lets players take control of Stubbs in a retro futuristic world of the 50s. So what is your main objective in Stubbs the Zombie? Well, eating brains and you'll be eating lots of brains in the process of completing this surprisingly brief game. The more brains you eat, the more zombies you have which helps in creating a diversion or shield from the cops. There some really interesting and creative special attacks too, one of them involves tossing your own hand and then using it to possess humans, allowing players access to weapons that is a good change of pace. The game has a great coop mode with an "incredibly funny plot" and the only complaint with the game is that it lasts only for about 5-6 hours.
The game is available on the Xbox Live Marketplace as an Xbox Original.

Zombies Took My Daughter

Your sweet little daughter has been kidnapped. If that wasn't bad enough on its own, the kidnappers are zombies. Thus begins Zombies Took My Daughter, an innovative and fun little zombie game. The game has everything you would expect from a zombie game: lots of weapons, loads of places to explore and, of course, tons of zombies to destroy. The thing that sets this game apart from most zombie games is that the game's city environment is generated randomly. Each game you play therefore will be different. Zombies Took My Daughter can be played here.

Sonny

In Sonny - a turn-based rpg with impressively high production values - you don't kill zombies but, in an unusual plot twist, play the part of a zombie. Sonny wasn't always a zombie. He used to be a normal bloke. But then he was involved in a accident on a ship. He should have died but instead he became a zombie. Now he is an all-out battle for survival.