When attacked by the walking dead, when your buddies' bodies get up to bite you, when the chain of command is not just broken but in tatters, here's what you do. Stick your head between your legs and kiss your butt goodbye!
Zombies!!! 2 Zombie Corps(e) lets you escape the town of the original Zombies!!! and search for the source of the undead epidemic on a nearby military installation.
This expansion could be played stand-alone with shotgun guys (or other player markers) and tokens for bullets and hearts.