How do you take an already great multiplayer game and make it even greater? Overrun Mode. What separates Overrun from a normal game of chainsaw your friends in half? Classes. Each participating character has a separate class, and with that class comes specific duties. It also means a much easier way to blame your friends for your team losing. But it also means you really have to work together to win. Check out the Overrun Tutorial video below, and the Jack Island level b-roll video past the break.