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. 12 SteamVault members have 100%-completed it so far. Below is the complete achievement list with global rarity and a full achievement difficulty breakdown.

Rarest achievement
2.0%
of players earned "Prolific Popper"
SteamVault 100%s
12
members fully completed it

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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%
The Plan
???
Hidden achievement — tap Reveal secrets to spoil
Ultra Rare2.5%
Laser Immunization
Laser Immunization
Complete Interloper without taking any laser damage.
Ultra Rare2.5%
Rare Specimen
Rare Specimen
Send the Hidden Hat to Xen.
Ultra Rare2.8%
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 Rare3.3%
Black Mesa Decathlon Winner
Black Mesa Decathlon Winner
Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Ultra Rare3.6%
Orbital Trajectory
Orbital Trajectory
Skip the opening Xen island with a secret jump.​
Ultra Rare3.8%
Following the Rules
???
Hidden achievement — tap Reveal secrets to spoil
Ultra Rare3.9%
xen when
???
Hidden achievement — tap Reveal secrets to spoil
Ultra Rare4.5%
Our Brains And Your Brawn
Our Brains And Your Brawn
Assemble all the possible Scientists and Guards at the end of Office Complex.
Very Rare5.2%
Ethically Questionable
Ethically Questionable
Conduct all of the questionable research experiments.
Very Rare5.3%
Hyper Saturation Conundrum
Hyper Saturation Conundrum
Drown in Lambda Core's coolant.
Very Rare5.9%
Gonad Glider
Gonad Glider
Get whacked into oblivion in the ledge fight.
Very Rare5.9%
Kinetic Repulsion
Kinetic Repulsion
Kill a Marine with their own Grenade.
Very Rare6.0%
One Step Ahead
One Step Ahead
Kill 10 Enemies with Tripmines​​.
Very Rare6.0%
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 Rare7.0%
Digital Wizardry
Digital Wizardry
Kill 10 enemies with a reprogrammed Sentry.
Very Rare8.8%
Resonance Procrastinator
Resonance Procrastinator
Refuse to insert the specimen into the Anti-Mass Spectrometer.
Very Rare9.5%
Universal Gravitation
Universal Gravitation
Get killed by your own Snarks.
Very Rare10.6%
Stealth Technology
Stealth Technology
Escape the Hangar in Surface Tension without alerting the Soldiers.
Very Rare10.7%
Contest Propellant
???
Hidden achievement — tap Reveal secrets to spoil
Very Rare10.7%
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 Rare11.7%
Nuclear Fishin'
Nuclear Fishin'
Kill an Ichthyosaur with either the Tau or Gluon.
Very Rare12.2%
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.
Rare15.6%
Proverbial Tinkerer
Proverbial Tinkerer
Interfere with the alarm and laptop in Anomalous Materials.
Rare16.3%
Rather an Anticlimax
Rather an Anticlimax
Decline G-Man’s offer of employment.
Rare16.5%
Mega Hertz
Mega Hertz
Kill 5 Enemies with one Grenade.
Rare18.7%
Quantum Capacitance
Quantum Capacitance
Overcharge it anyway.
Rare18.7%
Well-Done
Well-Done
Cook a Grenade for too long.
Rare18.8%
Caffeine Extraction
Caffeine Extraction
Perform surgical caffeine extraction from 20 vending machines.
Rare20.9%
Centripetal Attraction
Centripetal Attraction
Kill 20 Enemies with the Hivehand.
Rare22.7%
Dead Reckoning
Dead Reckoning
Kill an Assassin with the .357 Magnum.
Rare23.0%
Permeable Infrastructure
Permeable Infrastructure
Use the alternate path in Office Complex.
Rare23.3%
Limitless Potential
Limitless Potential
Accept G-Man’s offer of employment.
Rare24.9%
Inflammatory Actions
Inflammatory Actions
Kill a Headcrab using fire.
Rare25.6%
Premature Expulsion
Premature Expulsion
Use an entire clip of Gluon ammo in one continuous shot.
Rare26.4%
Anti-Matter Over Mind
Anti-Matter Over Mind
Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Rare27.6%
Prophylactic Suggested
Prophylactic Suggested
Get overtaken by a Headcrab's ample anterior.
Uncommon33.2%
Gray Matter Propulsion
Gray Matter Propulsion
Headshot 20 Enemies with the .357 Magnum.
Uncommon36.6%
Convection Refinement
Convection Refinement
Ruin the microwave casserole.
Common50.2%
Brownian Motion
Brownian Motion
Pass the toilet paper to the Scientist in need.
Common61.0%