Group Hug Achievement
Complete all missions co-op (2, 3, or 4p).
Complete all 18 campaign checkpoints while playing with more than one player.
These will unlock for all players whether split screen or online.
There’s no screen that explicitly tells you which ones have been done in co-op but go to Service Records and then Achievements and you’ll see a thin white progress bar at the bottom of the Group Hug achievement as well as many others.
>Find a partner in the Achievement Trading Thread!<