Big Bang Theory Achievement Help

I was with a group who got the Cryogenic Slumber Party achievement and thought that was the last big achievement I had to get. I get a little confused with the details of this achievement so I would like to get some people together who can help me out with this one. I have all the other big achievements from all the other maps and would like to 100% this game before BO2 comes out. I am a solid player with a mic and I play well with other people. Message my gamertag if you can help me out. Gamertag: II The Chez II