I'm new tot his series and while I'm a lifelong RPG player, I'm sort of new to online RPG's and a buddy and I are getting confused with all this online co-op XP talk. I take it from the comments here that you can't have one character that you can take to any online or offline game. What about my buddy and I who pre-ordered the game a while back and plan to ONLY play online with just him and I. Can we play the whole offline campaign online together? If so, if he joins my hosted game, does he retain the loot and xp when we start playing again? Also, if just him and I are playing online together, can we set up private games or must it be set to public all the time with morons bouncing in and out of the game? Lastly, we're getting the 360 version. Will we be able to get all achievements playing together online or will we have to go back through the whole game a second time in single player to get the achievements?