Alien Insanity Achievements Here is the full list of all 27 Alien Insanity 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 Level 1 UpPassed level 1 Level 2 UpPassed level 2 Level 3 UpPassed level 3 Mission 1 CompleteConquered alien ship Mission 2 CompleteLondon sewers cleansed Mission 3 CompleteAlien home world destroyed Level 4 UpPassed level 4 Level 5 UpPassed level 5 Level 6 UpPassed level 6 Level 7 UpPassed level 7 Level 8 UpPassed level 8 Level 9 UpPassed level 9 Level 10 UpPassed level 10 Level 11 UpPassed level 11 Level 12 UpPassed level 12 Level 13 UpPassed level 13 Level 14 UpPassed level 14 Level 15 UpPassed level 15 Level 16 UpPassed level 16 Level 17 UpPassed level 17 Level 18 UpPassed level 18 Level 19 UpPassed level 19 Level 20Passed level 20 Level 21Passed level 21 Level 22Passed level 22 Level 23Passed level 23 Level 24Passed level 24