Black Mesa achievements
50 achievements on Steam
Rarest first. Published rarity by platform.
Each platform measures its own player population.Why that matters
Each platform calculates rarity from its own player population. These percentages are shown side by side but are not a controlled comparison. Percentages are shown exactly as each platform publishes them — Pyroblast does not recalculate them or mix player populations together.
Prolific PopperSteam onlyKill all Protozoans in the Borderworld.
Steam2.0%
Pepperoni PrecipitationSteam onlySteam2.0%
The Rarest SpecimenSteam onlySteam2.1%
Post-Mortem IntervalSteam onlyFind each member of the missing research teams.
Steam2.1%
Unquestionably EthicalSteam onlySteam2.4%
The PlanSteam onlySteam2.5%
Laser ImmunizationSteam onlyComplete Interloper without taking any laser damage.
Steam2.5%
Rare SpecimenSteam onlySend the Hidden Hat to Xen.
Steam2.8%
Specimen GGSteam onlyTake out all three Healing Crystals in Nihilanth’s Chamber at the same time.
Steam3.2%
Late for WorkSteam onlyDefeat Nihilanth in under 4 minutes.
Steam3.3%
Doctor’s SignatureSteam onlyDeliver the finishing blow to Gonarch with your Crowbar.
Steam3.3%
Black Mesa Decathlon WinnerSteam onlyEscape the Gargantua’s Lair without taking any damage from Gargantuas.
Steam3.6%
Orbital TrajectorySteam onlySkip the opening Xen island with a secret jump.
Steam3.8%
Following the RulesSteam onlySteam3.9%
xen whenSteam onlySteam4.5%
Our Brains And Your BrawnSteam onlyAssemble all the possible Scientists and Guards at the end of Office Complex.
Steam5.2%
Ethically QuestionableSteam onlyConduct all of the questionable research experiments.
Steam5.3%
Hyper Saturation ConundrumSteam onlyDrown in Lambda Core's coolant.
Steam5.9%
Gonad GliderSteam onlyGet whacked into oblivion in the ledge fight.
Steam5.9%
Kinetic RepulsionSteam onlyKill a Marine with their own Grenade.
Steam6.0%
One Step AheadSteam onlyKill 10 Enemies with Tripmines.
Steam6.0%
Unified Coupling TheorumSteam onlyHelp the Barnacle and Headcrab find true love.
Steam6.4%
Futile ResistanceSteam onlyKill 10 Enemies with Snarks.
Steam7.0%
Digital WizardrySteam onlyKill 10 enemies with a reprogrammed Sentry.
Steam8.8%
Resonance ProcrastinatorSteam onlyRefuse to insert the specimen into the Anti-Mass Spectrometer.
Steam9.5%
Universal GravitationSteam onlyGet killed by your own Snarks.
Steam11%
Stealth TechnologySteam onlyEscape the Hangar in Surface Tension without alerting the Soldiers.
Steam11%
Contest PropellantSteam onlySteam11%
Remote DetonationSteam onlyKill a Barnacle with a Satchel.
Steam11%
PhD in PacifismSteam onlyDon't kill any Vortigaunts in the Borderworld.
Steam12%
Nuclear Fishin'Steam onlyKill an Ichthyosaur with either the Tau or Gluon.
Steam12%
Calculated TrajectorySteam onlyKill 10 airborne Headcrabs using the Shotgun.
Steam13%
Less Than Desirable ConsequencesSteam onlyDie in the AMS Beam before starting the experiment.
Steam16%
Proverbial TinkererSteam onlyInterfere with the alarm and laptop in Anomalous Materials.
Steam16%
Rather an AnticlimaxSteam onlyDecline G-Man’s offer of employment.
Steam17%
Mega HertzSteam onlyKill 5 Enemies with one Grenade.
Steam19%
Quantum CapacitanceSteam onlyOvercharge it anyway.
Steam19%
Well-DoneSteam onlyCook a Grenade for too long.
Steam19%
Caffeine ExtractionSteam onlyPerform surgical caffeine extraction from 20 vending machines.
Steam21%
Centripetal AttractionSteam onlyKill 20 Enemies with the Hivehand.
Steam23%
Dead ReckoningSteam onlyKill an Assassin with the .357 Magnum.
Steam23%
Permeable InfrastructureSteam onlyUse the alternate path in Office Complex.
Steam23%
Limitless PotentialSteam onlyAccept G-Man’s offer of employment.
Steam25%
Inflammatory ActionsSteam onlyKill a Headcrab using fire.
Steam26%
Premature ExpulsionSteam onlyUse an entire clip of Gluon ammo in one continuous shot.
Steam26%
Anti-Matter Over MindSteam onlyKill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Steam28%
Prophylactic SuggestedSteam onlyGet overtaken by a Headcrab's ample anterior.
Steam33%
Gray Matter PropulsionSteam onlyHeadshot 20 Enemies with the .357 Magnum.
Steam37%
Convection RefinementSteam onlyRuin the microwave casserole.
Steam50%
Brownian MotionSteam onlyPass the toilet paper to the Scientist in need.
Steam61%
Played Black Mesa? See how many of these you've got.
- Which ones you've earned — and which you're missing
- Your rarest unlock, and where it ranks
- Your whole history for this game, on one timeline
- Steam, PlayStation, Xbox and Battle.net in one place
Free. Takes about a minute.
How rarity is calculated
Each platform calculates rarity from its own player population. These percentages are shown side by side but are not a controlled comparison.
- Steam — Valve's published global unlock percentage across Steam owners of the game.
Percentages are shown exactly as each platform publishes them. Pyroblast does not recalculate them and does not mix player populations together. Data updated .