Black Mesa

Black Mesa

50 achievements
Ultra Rare×15
Very Rare×17
Rare×14
Uncommon×2
Common×2

About Black Mesa's achievements

Black Mesa has 50 Steam achievements, 15 of them ultra-rare — unlocked by under 5% of players. The rarest is "Prolific Popper", earned by just 2.0% of players. Below is the complete achievement list with global rarity, a difficulty breakdown, and a SteamVault guide for every achievement.

Rarest achievement
2.0%
of players earned "Prolific Popper"

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Difficulty—
Easy → Brutal
Enjoyment—
Meh → Loved it
Grindiness—
No grind → Huge grind
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All Black Mesa achievements

50 achievements
Prolific Popper
Prolific Popper
Kill all Protozoans in the Borderworld.
Ultra Rare2.0%
Pepperoni Precipitation
???
Hidden achievement — tap Reveal secrets to spoil
Ultra Rare2.0%
The Rarest Specimen
???
Hidden achievement — tap Reveal secrets to spoil
Ultra Rare2.1%
Post-Mortem Interval
Post-Mortem Interval
Find each member of the missing research teams.
Ultra Rare2.1%
Unquestionably Ethical
???
Hidden achievement — tap Reveal secrets to spoil
Ultra Rare2.4%
Laser Immunization
Laser Immunization
Complete Interloper without taking any laser damage.
Ultra Rare2.5%
The Plan
???
Hidden achievement — tap Reveal secrets to spoil
Ultra Rare2.6%
Rare Specimen
Rare Specimen
Send the Hidden Hat to Xen.
Ultra Rare2.9%
Specimen GG
Specimen GG
Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Ultra Rare3.2%
Doctor’s Signature
Doctor’s Signature
Deliver the finishing blow to Gonarch with your Crowbar.
Ultra Rare3.3%
Late for Work
Late for Work
Defeat Nihilanth in under 4 minutes.​
Ultra Rare3.4%
Black Mesa Decathlon Winner
Black Mesa Decathlon Winner
Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Ultra Rare3.7%
Orbital Trajectory
Orbital Trajectory
Skip the opening Xen island with a secret jump.​
Ultra Rare3.9%
Following the Rules
???
Hidden achievement — tap Reveal secrets to spoil
Ultra Rare4.0%
xen when
???
Hidden achievement — tap Reveal secrets to spoil
Ultra Rare4.5%
Ethically Questionable
Ethically Questionable
Conduct all of the questionable research experiments.
Very Rare5.3%
Our Brains And Your Brawn
Our Brains And Your Brawn
Assemble all the possible Scientists and Guards at the end of Office Complex.
Very Rare5.3%
Hyper Saturation Conundrum
Hyper Saturation Conundrum
Drown in Lambda Core's coolant.
Very Rare6.0%
Gonad Glider
Gonad Glider
Get whacked into oblivion in the ledge fight.
Very Rare6.0%
Kinetic Repulsion
Kinetic Repulsion
Kill a Marine with their own Grenade.
Very Rare6.1%
One Step Ahead
One Step Ahead
Kill 10 Enemies with Tripmines​​.
Very Rare6.1%
Unified Coupling Theorum
Unified Coupling Theorum
Help the Barnacle and Headcrab find true love.
Very Rare6.4%
Futile Resistance
Futile Resistance
Kill 10 Enemies with Snarks.
Very Rare7.1%
Digital Wizardry
Digital Wizardry
Kill 10 enemies with a reprogrammed Sentry.
Very Rare8.9%
Resonance Procrastinator
Resonance Procrastinator
Refuse to insert the specimen into the Anti-Mass Spectrometer.
Very Rare9.6%
Universal Gravitation
Universal Gravitation
Get killed by your own Snarks.
Very Rare10.7%
Stealth Technology
Stealth Technology
Escape the Hangar in Surface Tension without alerting the Soldiers.
Very Rare10.8%
Contest Propellant
???
Hidden achievement — tap Reveal secrets to spoil
Very Rare10.8%
Remote Detonation
Remote Detonation
Kill a Barnacle with a Satchel.
Very Rare11.2%
PhD in Pacifism
PhD in Pacifism
Don't kill any Vortigaunts in the Borderworld.
Very Rare11.9%
Nuclear Fishin'
Nuclear Fishin'
Kill an Ichthyosaur with either the Tau or Gluon.
Very Rare12.3%
Calculated Trajectory
Calculated Trajectory
Kill 10 airborne Headcrabs using the Shotgun.
Very Rare13.4%
Less Than Desirable Consequences
Less Than Desirable Consequences
Die in the AMS Beam before starting the experiment.
Rare15.7%
Proverbial Tinkerer
Proverbial Tinkerer
Interfere with the alarm and laptop in Anomalous Materials.
Rare16.4%
Rather an Anticlimax
Rather an Anticlimax
Decline G-Man’s offer of employment.
Rare16.7%
Mega Hertz
Mega Hertz
Kill 5 Enemies with one Grenade.
Rare18.8%
Quantum Capacitance
Quantum Capacitance
Overcharge it anyway.
Rare18.8%
Well-Done
Well-Done
Cook a Grenade for too long.
Rare19.0%
Caffeine Extraction
Caffeine Extraction
Perform surgical caffeine extraction from 20 vending machines.
Rare21.0%
Centripetal Attraction
Centripetal Attraction
Kill 20 Enemies with the Hivehand.
Rare22.8%
Dead Reckoning
Dead Reckoning
Kill an Assassin with the .357 Magnum.
Rare23.2%
Permeable Infrastructure
Permeable Infrastructure
Use the alternate path in Office Complex.
Rare23.4%
Limitless Potential
Limitless Potential
Accept G-Man’s offer of employment.
Rare25.1%
Inflammatory Actions
Inflammatory Actions
Kill a Headcrab using fire.
Rare25.7%
Premature Expulsion
Premature Expulsion
Use an entire clip of Gluon ammo in one continuous shot.
Rare26.6%
Anti-Matter Over Mind
Anti-Matter Over Mind
Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Rare27.9%
Prophylactic Suggested
Prophylactic Suggested
Get overtaken by a Headcrab's ample anterior.
Uncommon33.3%
Gray Matter Propulsion
Gray Matter Propulsion
Headshot 20 Enemies with the .357 Magnum.
Uncommon36.8%
Convection Refinement
Convection Refinement
Ruin the microwave casserole.
Common50.3%
Brownian Motion
Brownian Motion
Pass the toilet paper to the Scientist in need.
Common61.1%