Think about it! Of course this'd be hard to pull off, and may only be done on the Xbox 360/720 and the PS3/PS4, but it's not impossible. EDIT: you guys seem to think that it has to be directly via the LIVE / PS network but what I was trying to say is that they could send the data from the game to a central server located at Bungie or Activision and work it that way. Software and hardware don't matter as they could send the same packets of player / enemy / etc positions to every console and have the game's engine translate it. Think outside the (x)box.