Achievement Unlocked Visibility Global Unlocks
Rather an Anticlimax
Decline G-Man’s offer of employment.
2020-07-03 20:13:42 15.5%
Limitless Potential
Accept G-Man’s offer of employment.
2020-07-03 20:08:15 23.7%
Contest Propellant
Find the snack supply canister.
2020-06-30 20:30:05
10.2%
Anti-Matter Over Mind
Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
2020-06-30 20:26:05 26.4%
Well-Done
Cook a Grenade for too long.
2020-06-30 16:20:06 17.6%
Remote Detonation
Kill a Barnacle with a Satchel.
2020-06-30 15:03:29 11.5%
Premature Expulsion
Use an entire clip of Gluon ammo in one continuous shot.
2020-06-29 16:49:16 26.3%
Calculated Trajectory
Kill 10 airborne Headcrabs using the Shotgun.
2020-06-28 09:21:30 14.0%
Quantum Capacitance
Overcharge it anyway.
2020-06-27 21:50:21 19.7%
Inflammatory Actions
Kill a Headcrab using fire.
2020-06-19 22:55:59 25.6%
Prophylactic Suggested
Get overtaken by a Headcrab's ample anterior.
2019-04-28 10:12:15 34.4%
Resonance Procrastinator
Refuse to insert the specimen into the Anti-Mass Spectrometer.
2019-04-28 10:00:17 9.8%
Proverbial Tinkerer
Interfere with the alarm and laptop in Anomalous Materials.
2019-04-28 09:50:23 17.0%
Dead Reckoning
Kill an Assassin with the .357 Magnum.
2016-08-22 21:08:34 23.3%
Mega Hertz
Kill 5 Enemies with one Grenade.
2016-08-21 23:38:45 19.0%
Centripetal Attraction
Kill 20 Enemies with the Hivehand.
2016-08-21 15:24:43 24.2%
Gray Matter Propulsion
Headshot 20 Enemies with the .357 Magnum.
2016-07-30 20:53:40 38.7%
Permeable Infrastructure
Use the alternate path in Office Complex.
2016-06-29 21:23:05 24.1%
Caffeine Extraction
Perform surgical caffeine extraction from 20 vending machines.
2016-06-29 21:10:09 22.9%
Brownian Motion
Pass the toilet paper to the Scientist in need.
2016-06-24 17:38:12 62.5%
Convection Refinement
Ruin the microwave casserole.
2016-06-24 17:35:17 51.2%
Kinetic Repulsion
Kill a Marine with their own Grenade.
6.0%
Laser Immunization
Complete Interloper without taking any laser damage.
2.2%
Late for Work
Defeat Nihilanth in under 4 minutes.​
2.9%
Less Than Desirable Consequences
Die in the AMS Beam before starting the experiment.
14.1%
Doctor’s Signature
Deliver the finishing blow to Gonarch with your Crowbar.
3.0%
Futile Resistance
Kill 10 Enemies with Snarks.
7.2%
Digital Wizardry
Kill 10 enemies with a reprogrammed Sentry.
9.3%
Nuclear Fishin'
Kill an Ichthyosaur with either the Tau or Gluon.
12.5%
One Step Ahead
Kill 10 Enemies with Tripmines​​.
5.8%
Orbital Trajectory
Skip the opening Xen island with a secret jump.​
3.5%
PhD in Pacifism
Don't kill any Vortigaunts in the Borderworld.
11.1%
Post-Mortem Interval
Find each member of the missing research teams.
1.8%
Pepperoni Precipitation
View the *other* secret ending.
1.6%
Black Mesa Decathlon Winner
Escape the Gargantua’s Lair without taking any damage from Gargantuas.
3.2%
Prolific Popper
Kill all Protozoans in the Borderworld.
1.7%
Unified Coupling Theorum
Help the Barnacle and Headcrab find true love.
6.4%
The Rarest Specimen
Carry the Hidden Hat to Endgame.
1.8%
Rare Specimen
Send the Hidden Hat to Xen.
2.8%
Specimen GG
Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
2.8%
Stealth Technology
Escape the Hangar in Surface Tension without alerting the Soldiers.
10.1%
The Plan
Use Cyanogen to kill Gonarch.
2.2%
Unquestionably Ethical
Don't use the Cyanogen and let the Gonarch live.
2.1%
Our Brains And Your Brawn
Assemble all the possible Scientists and Guards at the end of Office Complex.
4.8%
Following the Rules
Use the welcome mat.
3.6%
xen when
Wait too long to jump into the Lambda Teleporter.
3.8%
Universal Gravitation
Get killed by your own Snarks.
11.1%
Gonad Glider
Get whacked into oblivion in the ledge fight.
5.5%
Hyper Saturation Conundrum
Drown in Lambda Core's coolant.
6.3%
Ethically Questionable
Conduct all of the questionable research experiments.
5.6%