Delta Particles Achievements Here is the full list of all 53 Delta Particles achievements.Filter Achievement View View Image viewList view Sort by Won first then 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 AllWonNot wonSomething else?Watch the post-credits scene. 17 January 2026 - Add a guideIt's based. It's Delta BasedFinish the campaign. 17 January 2026 - Add a guideHeart-stoppingly cute momentEnter the portal. 17 January 2026 - Add a guideVeteran of the shootersKill three alien controllers with the under-barrel grenade launcher. 17 January 2026 - Add a guideStrange placeVisit a rotating radioactive asteroid. 17 January 2026 - Add a guideFlies don't let sleepDestroy all alien hives in Xen. 17 January 2026 - Add a guideGood riddanceGet caught in an alien storm and successfully die there. 17 January 2026 - Add a guideUnnecessary crueltyKill the bullsquid before it gets into the hurricane. 17 January 2026 - Add a guideBlue lagoonSurvive the Xen arena without using the healing pool. 17 January 2026 - Add a guideDeforestationDestroy 25 Xen Trees. 17 January 2026 - Add a guidePunishment for ImmortalityDestroy 10 Xen Trees. 17 January 2026 - Add a guideUnknown worldFind yourself in the alien world. 17 January 2026 - Add a guideFashionistaDiana equipped a protection suit. 17 January 2026 - Add a guideResuscitated hopeFind Diana in the tunnels. 07 January 2026 - Add a guideNo brains at all anymoreBehead 125 enemies. 07 January 2026 - Add a guideIn the line of fireKill two enemies with the Light Gun in one shot. 07 January 2026 - Add a guideLocomotiveGet through the place after parking without destroying an enemy SUV. 07 January 2026 - Add a guideTo use a sledgehammer to crack a nutKill five headcrabs with the sniper rifle. 07 January 2026 - Add a guideWe are saved… or not?Transmit a SOS signal from the helipad. 07 January 2026 - Add a guideMechanical manActivate the guard robot at the robot factory. 07 January 2026 - Add a guideScience and madnessStabilize the power generator. 07 January 2026 - Add a guideIntimidating but ineffectiveTurn on the power and open the fence door without killing Garg. 06 January 2026 - Add a guideHurry up, before he looks away from us...It seems you've been robbed of something valuable. 06 January 2026 - Add a guideIn the darknessTurn off the light and leave the basement. 06 January 2026 - Add a guideIt's redundantBehead 60 enemies. 06 January 2026 - Add a guideOops, nothing personalBlow up the container with the scientist inside. 06 January 2026 - Add a guideAnyway, you're already deadKill a struggling scientist in the basement. 06 January 2026 - Add a guideSilence 2.0Pick up a silencer for SMG. 06 January 2026 - Add a guideIt's high noon!Kill six enemies in a row with a single clip from your revolver without changing weapons. 06 January 2026 - Add a guideOvertimeGet the cargo down to the railcar. 06 January 2026 - Add a guideSwiftly and without sufferingDump the chemicals. 06 January 2026 - Add a guideDecapitation!Behead 25 enemies. 06 January 2026 - Add a guideFree travelTake a trip on the monorail train. 06 January 2026 - Add a guideRadical problem solvingDemolish the jammed door. 06 January 2026 - Add a guideIt was difficult, but I succeededSave the security officer from three zombies in the lab. 06 January 2026 - Add a guideGot you!Save the scientist from zombie in the lab. 06 January 2026 - Add a guideMight makes rightDestroy one Robotic Infantry unit with a melee weapon. 06 January 2026 - Add a guideHands off!Kill the headcrab inside the healing pod. 06 January 2026 - Add a guideThree hatchets 777Find a bottle of healing liquid and drink it. 06 January 2026 - Add a guideOh, my!Find "interesting" photos. 06 January 2026 - Add a guidePleasant meetingMeet Diana after the disaster. 06 January 2026 - Add a guideLow batteryGet additional points of armor from the technician three times. 06 January 2026 - Add a guideI said don't go in thereEnter the barricaded room against the scientist's advice. 06 January 2026 - Add a guideIt's a really big gunFind a shotgun early. 06 January 2026 - Add a guideAt the employer's expenseDrink 25 soda cans. 05 January 2026 - Add a guideJewelry workBehead a zombie using the pipe wrench. 05 January 2026 - Add a guideWho's here?Turn on emergency power supply after the disaster. 05 January 2026 - Add a guideSafety violationYou were squashed by a cargo container. 05 January 2026 - Add a guideFriends like you…Prevent security officer from listening to music. 05 January 2026 - Add a guideRare colorEquip a protection suit. 05 January 2026 - Add a guideMore than just a gamerFinish the game on medium difficulty. Locked - Add a guideDelta-ChadFinish the game on hard difficulty. Locked - Add a guideHelpful storage roomUnlock all rooms with supplies inside. Locked - Add a guide