I don't have my xbox connected to the internet and none of my mates are into playing this, or any other games. BUT I really want to play the co-op games, is this possible? I've got two controllers. Could I just have one guy hiding behind a wall near the start while I plough on, battering through the bad guys on my own then bring #2 guy to the end point after I've done all the killing? Please let me know! Love this game series and want to get the absolute most out of it!