Awesome game. Ending is a bit anti-climactic.
Also, a slight bug: I killed a zombie while I was near a criminal and he said, "Thanks. I'll follow you." Then he shot at me. I realize criminals have a lower standard of morals than most people, but I doubt they're intended to lie to us.
Suggestion: I don't like the fact that if your using room or game chat, it still switches you to a new chat box everytime you enter a new area. Possibly have it only switch when your using the RoS chatbox? That being said, I love the addition of RoS chat.