I want to get into this whole shoot and loot thing. But, I dont really have any real life friends that play video games. I play BF3 etc. with other people from US/Europe, but not with any friends (coz I dont have any that play). So, if I buy this game (and this game only has a co -op campaign, correct?), how do I play it? Do I have to have the same 3 people always playing with me or can I start off from where i leave, but with different people?I don't want to play the single player campaign because I tried that with the first game and it was boring as f*** in SP mode.