4 0 3Actions Report Solution To do this you have to complete every Co-Op mission in the game. Youtube user llBlackKnightll made an hour long video showcasing the missions on Hard.You do not need to complete the missions on Hard for the achievement to pop.Here is the video: Showing all 3 comments. Leave a comment. If someone wanna do this add mePosted by DerXboxJoey3 on 15 Apr 23 at 23:48 If anyone needs this, please message me :)Posted by Dead Dweller on 03 Aug 23 at 18:51 Message me need help wit this achievementPosted by Drip4ormoney on 17 Jan at 02:48 Leave a comment