The Unwritten Rules of Call of Duty: Modern Warfare 3 Zombies

As promised in the lead-up to its release, Call of Duty: Modern Warfare 3 Zombies shakes things up in a number of ways. Instead of the big quest Easter eggs CoD Zombies is known for, MWZ offers a mission structure like DMZ that presents the story in a clearer manner, with secrets limited to things like free perks, teleport doors, and a vault mini quest. A few dozen players will roam around Urzikstan at once, allowing for some interesting interactions as players complete contracts in the open-world, with the various tiers providing big difficulty increases and loot being a key focus.