Co-op is brilliant. I absolutely love it and think it's hilarious. So many different weapons flying around it's madness. We have to get some PESgaming sessions on this. Online multiplayer is also great, just takes some getting used to, what with everyone flying around the map like frickin' monkeys. It was like when I first played Crysis 2 online, with everyone teleporting and shit. Takes some getting used to, but it's really good.