Aliens: Dark Descent Achievements Here is the full list of all 45 Aliens: Dark Descent 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 Flag Filter All None 45 Offline Mode 45 Single Player 13 Main Storyline 4 Difficulty Specific 3 Stackable 1 Collectable 1 Cumulative + 8 Level Link flagsOR joinAND join Achievements without these flags What are achievement flags? Click to find outApply This Is Hayes, Pioneer Station, Signing OffFinish the Prologue. Something Lurks Under The HillsComplete Mission 01. First Steps Into MadnessComplete Mission 02. Harper's HellComplete Mission 03. Making a StandComplete Mission 04. Where It All BegunComplete Mission 05. Living NightmareComplete Mission 06. The Darwin Era Was HereComplete Mission 07. Deep Into InsanityComplete Mission 08. The PassengerComplete Mission 09. The SpireComplete Mission 10. Excavating The TruthComplete Mission 11. Abysmal HorrorsComplete Mission 12. The More The MerrierUnlock the APC. This Went SmoothlyFinish the game on Medium. Fair And SquareFinish the game on Hard. This Ain't No PicnicFinish the game on Nightmare. Perfect OrganismFinish the game on "No One Can Hear Them Scream" mode. RegicideKill every Queen during a campaign. Cleaning Lethe, One Nest At A TimeDuring a campaign, kill 100 Xenomorphs. Come on, You Wanna Live Forever?Advance a Sergeant to level 10. El Riesgo Siempre ViveAdvance a Gunner to level 10. Bandage LoverAdvance a Medic to level 10. The Cable GuyAdvance a Tecker to level 10. FrontlinerAdvance a Recon to level 10. Hardened In The Heat Of BattleDuring a campaign, advance each Marine Class to level 10. Heavy StepsLure a Queen into a Mine. Stuff Of NightmaresSave a Marine from being incubated. Flawless VictoryKeep all of your marines alive during a campaign. ArchivistGather all datapads. Colonial BarrelsKill an enemy by using an explosive barrel. Damn Dude, You Gotta Lose Some Weight!Secure an unconscious marine. Omelette Du FromageDestroy 4 eggs with one grenade or an RPG shot. Recouped InvestmentHave one Sentry kill at least 10 aliens. Use The Bumper, That's What It's ForMake the ARC/APC run over an enemy. This Was No PapercutSave a marine from dying of Bleeding. Keep 'Em ComingKill every Alien of a Massive Onslaught. Snatched OutPrevent a marine from being Abducted. The True ExperienceIn any mission, complete at least one objective with only one marine in the squad. The Shrink Hates MeRemove a Trait from a marine. Call Me SnakeKill an enemy before they detect the squad. Perfect EnhancementsDuring a campaign, unlock every Xeno Tech. One For Every OccasionDuring a campaign, unlock every weapons. People PersonDuring a campaign, secure 5 survivors. Chalk It Up To ExperienceHave a marine with at least 2 Prostheses.