Quick video guide:
Gather up 3 other players.
Press start, then hold
Use the Xbox screen shot to take a photo of all four of you in the shot.
To take the screen shot, hit the
on your controller then hit
This achievement is buggy. I’d advise getting into a group of four players and then trying this achievement as just taking a picture of 4 agents in a safe house does not appear to work (however I have not tested this).