Crackdown

Hello.

I was just wondering if anyone had completed the achievement called 'Tag Teamer'.

If so, do you have to complete all the missions in one person's game? Do you have to play with the same person?

Or, can you just complete all the missions somewhere along the line, regardless of whose game you're in and who you are playing with?

Any help would be very much appreciated.

I'm not sure, I've been wondering about that myself. I'm also wondering if you have to complete it in one go or if you can do a few missions and go back to it another time.

Easy way to do it if you don't want to go back through and fight every boss in the main game mode over and over again is to go through with a friend in time trials mode and just kill each boss.  That way it reduces the time and you can keep a more accurate count of your progress without having to worry about main storyline or side quest issues.