THIS ACHIEVEMENT IS POSSIBLE GLITCHED... No more!
EDIT: upcoming patch nxt week should fix this bug!!
EDIT2: PATCH 1.03 today fixed the glitch so I've deleted my solution. By now all u have to do is to complete the main story missions with brother 1,2,3 and Siegturm/Lab X and every side mission that ur comrades in the catacombs offers to you. - Remember that after u beat the main story missions some more side missions appear. When u have finished all quests (u can check it under menu > statistics > progression) the achievement should pop as intended.
PS: I don't know why some dudes here always vote Tips or guides down. All my intention was to help someone who doesn't want to wait until a patch fix this glitch. Yes the way I offered included much work.
I don't think that I post anything again here for future games since the community mostly reacts toxic when the solution doesn't fit into their minds...