01Achievements
Every Black Mesa achievement, ordered by how few players in the world have unlocked it.
50 of 50 entries
Prolific PopperKill all Protozoans in the Borderworld.2%Very rare
Pepperoni Precipitation—2%Very rare
Post-Mortem IntervalFind each member of the missing research teams.2.1%Very rare
The Rarest Specimen—2.1%Very rare
Unquestionably Ethical—2.4%Very rare
Laser ImmunizationComplete Interloper without taking any laser damage.2.5%Very rare
The Plan—2.6%Very rare
Rare SpecimenSend the Hidden Hat to Xen.2.9%Very rare
Specimen GGTake out all three Healing Crystals in Nihilanth’s Chamber at the same time.3.2%Very rare
Doctor’s SignatureDeliver the finishing blow to Gonarch with your Crowbar.3.3%Very rare
Late for WorkDefeat Nihilanth in under 4 minutes.3.4%Very rare
Black Mesa Decathlon WinnerEscape the Gargantua’s Lair without taking any damage from Gargantuas.3.7%Very rare
Orbital TrajectorySkip the opening Xen island with a secret jump.3.9%Very rare
Following the Rules—4%Very rare
xen when—4.5%Very rare
Our Brains And Your BrawnAssemble all the possible Scientists and Guards at the end of Office Complex.5.2%Rare
Ethically QuestionableConduct all of the questionable research experiments.5.3%Rare
Gonad GliderGet whacked into oblivion in the ledge fight.5.9%Rare
Hyper Saturation ConundrumDrown in Lambda Core's coolant.5.9%Rare
One Step AheadKill 10 Enemies with Tripmines.6%Rare
Kinetic RepulsionKill a Marine with their own Grenade.6%Rare
Unified Coupling TheorumHelp the Barnacle and Headcrab find true love.6.4%Rare
Futile ResistanceKill 10 Enemies with Snarks.7%Rare
Digital WizardryKill 10 enemies with a reprogrammed Sentry.8.8%Rare
Resonance ProcrastinatorRefuse to insert the specimen into the Anti-Mass Spectrometer.9.5%Rare
Universal GravitationGet killed by your own Snarks.10.6%Rare
Stealth TechnologyEscape the Hangar in Surface Tension without alerting the Soldiers.10.7%Rare
Contest Propellant—10.8%Rare
Remote DetonationKill a Barnacle with a Satchel.11.2%Rare
PhD in PacifismDon't kill any Vortigaunts in the Borderworld.11.8%Rare
Nuclear Fishin'Kill an Ichthyosaur with either the Tau or Gluon.12.3%Rare
Calculated TrajectoryKill 10 airborne Headcrabs using the Shotgun.13.4%Rare
Less Than Desirable ConsequencesDie in the AMS Beam before starting the experiment.15.7%Rare
Proverbial TinkererInterfere with the alarm and laptop in Anomalous Materials.16.4%Rare
Rather an AnticlimaxDecline G-Man’s offer of employment.16.6%Rare
Quantum CapacitanceOvercharge it anyway.18.7%Rare
Mega HertzKill 5 Enemies with one Grenade.18.7%Rare
Well-DoneCook a Grenade for too long.18.9%Rare
Caffeine ExtractionPerform surgical caffeine extraction from 20 vending machines.21%Uncommon
Centripetal AttractionKill 20 Enemies with the Hivehand.22.7%Uncommon
Dead ReckoningKill an Assassin with the .357 Magnum.23.1%Uncommon
Permeable InfrastructureUse the alternate path in Office Complex.23.3%Uncommon
Limitless PotentialAccept G-Man’s offer of employment.25%Uncommon
Inflammatory ActionsKill a Headcrab using fire.25.6%Uncommon
Premature ExpulsionUse an entire clip of Gluon ammo in one continuous shot.26.5%Uncommon
Anti-Matter Over MindKill a Controller without killing any of its mind-controlled Vortigaunt slaves.27.7%Uncommon
Prophylactic SuggestedGet overtaken by a Headcrab's ample anterior.33.3%Uncommon
Gray Matter PropulsionHeadshot 20 Enemies with the .357 Magnum.36.7%Uncommon
Convection RefinementRuin the microwave casserole.50.2%Common
Brownian MotionPass the toilet paper to the Scientist in need.61.1%Common
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