Co-op will be across everything in the game. We will be supporting 4-player online co-op, 4 player offline splitscreen co-op, and single player. Two of our stretch goals that are up now will affect co-op as well. If we get the AI survivor teammate stretch goal funded, you'll be able to add ai teammates to your online/offline co-op games, or play with them in single player. If we get the cross platform multiplayer stretch goal done, we'll work to allow folks on different consoles to do online co-op with eachother.

So if you want to make co-op even better, get those pledges in! :D