If there was 3 or 4 player co-op...god, this game would be awesome as anything. I play with 2 of my friends and well, all we ever really play is Horde(in the new one of course), I would think that if there was 3-4 player co-op we'd probably be playing that, as it is definitely more fun with another person. I've been trying to go through on Insane on my own as I am growing tired of waiting for one of my friends to help with it, and it is just not as fun as it is when someone else is playing with you.