So in game there is a portion to form a group. I haven't tried it because nobody has been on, but it seems that you pull them straight from your uplay friends list which you can bring up in game. I haven't played it yet I was waiting to group up and play terrorist hunt which has 3 or 4 levels of difficulty. From a few terrorist with reduced damage all the way to 'for the love of god please stop shooting me'.
Last edited by Feetwet; 10/01/15 06:57 PM. Reason: group size is 4 or 5 I think