Im am doing the Completionist achievement for extcintion and what u have 2 do is complete all the chalanges and escape alive. So if u want 2 join u have 2 be prestige( no exceptions), Must no how 2 do all the challenges, be good, and have a mic so we can communicate. If ur lvl 30 I will except u but if ur 29 don't waste ur time. Otherwise msg me saying achievement and ill invite u. Gamertag is Flamingdog2000. I will start at 4 players.