This does have online coop but it REALLY SUCKS! The lag is crazy! Everyone has this issue unless the person is in the same state as you. Even odder, the host actually lags as well. It has some horrible networking code and makes me a bit worried about Halo 4. If you're after it just for slip screen, get it! It feels exactly the same as the first one did. I'm sure this has been said before, only hardcore fans should get it if you've already played it on the original xbox. New comers should check it out but don't expect to much out of it, the game is 10(?) years old with just updated graphics.