I am thinking about buying Diablo 3 but I have a co-op play question. Although I am interested in online multiplayer stuff, I am mostly looking for a game that would allow my brother in law and I to have post-pub drunken co-op campaign play. This would involve both of us on the same pc, one on an xbox 360 pad and the other on mouse and keyboard. Alternatively both on xbox pads. Is this possible? If so, would we then be able to allow others to join us online? Is the co-op I'm talking about full story mode or a simple add on? There seems to be far too many games these days ignoring good oldschool couch co-op where you can punch your mate and dead his leg if he cheats/ninjaloots etc... Maybe I'm just getting old, but I'd like to be sure before I buy.