Alien Outpost Achievements Here is the full list of all 9 Alien Outpost achievements.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc What are achievement flags? Click to find outApply killed the first bossGreat 2nd Boss KilledBanging 3RD Boss DEADSmashing Final boss1ST HALF Final boss part22nd HALF STAGE 1 COMPLETEDSmashing it STAGE 2 COMPLETEDGreat!! STAGE 3 COMPLETEDSTAGE 3 COMPLETED STAGE 3 COMPLETEDinto the breach