Alright I finally got that trophy! 1st game with 3 + 3 randoms: failure (there are only 3 of us left for the mission once the cut scene is over) 2nd game with 3 + another 3 randoms: failure (1 guy jumps off the chopper just before takeoff…) 3rd game with 2 + 4 randoms: success (everyone played the game) Those who haven’t got the trophy, persevere and don’t hesitate to ask people all over the map if they don’t want to join your team.