Achievement Unlocked Visibility Global Unlocks
Limitless Potential
Accept G-Man’s offer of employment.
2020-04-06 02:48:39 23.7%
Premature Expulsion
Use an entire clip of Gluon ammo in one continuous shot.
2020-04-06 02:29:21 26.3%
PhD in Pacifism
Don't kill any Vortigaunts in the Borderworld.
2020-04-06 02:22:05 11.1%
Anti-Matter Over Mind
Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
2020-04-06 00:40:35 26.4%
Gray Matter Propulsion
Headshot 20 Enemies with the .357 Magnum.
2020-04-05 21:20:10 38.6%
Universal Gravitation
Get killed by your own Snarks.
2020-04-05 21:14:50 11.1%
One Step Ahead
Kill 10 Enemies with Tripmines​​.
2020-04-05 21:14:02 5.8%
Dead Reckoning
Kill an Assassin with the .357 Magnum.
2020-04-05 21:12:17 23.3%
Prophylactic Suggested
Get overtaken by a Headcrab's ample anterior.
2020-04-03 01:35:12 34.4%
Inflammatory Actions
Kill a Headcrab using fire.
2020-01-03 23:50:33 25.6%
Brownian Motion
Pass the toilet paper to the Scientist in need.
2019-09-22 19:51:58 62.5%
Convection Refinement
Ruin the microwave casserole.
51.2%
Following the Rules
Use the welcome mat.
3.5%
Gonad Glider
Get whacked into oblivion in the ledge fight.
5.5%
Hyper Saturation Conundrum
Drown in Lambda Core's coolant.
6.3%
Remote Detonation
Kill a Barnacle with a Satchel.
11.5%
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%
Futile Resistance
Kill 10 Enemies with Snarks.
7.2%
Mega Hertz
Kill 5 Enemies with one Grenade.
18.9%
Nuclear Fishin'
Kill an Ichthyosaur with either the Tau or Gluon.
12.4%
Orbital Trajectory
Skip the opening Xen island with a secret jump.​
3.5%
Permeable Infrastructure
Use the alternate path in Office Complex.
24.1%
Post-Mortem Interval
Find each member of the missing research teams.
1.8%
Pepperoni Precipitation
View the *other* secret ending.
1.6%
Proverbial Tinkerer
Interfere with the alarm and laptop in Anomalous Materials.
17.0%
Prolific Popper
Kill all Protozoans in the Borderworld.
1.7%
Quantum Capacitance
Overcharge it anyway.
19.7%
The Rarest Specimen
Carry the Hidden Hat to Endgame.
1.8%
Rare Specimen
Send the Hidden Hat to Xen.
2.8%
Resonance Procrastinator
Refuse to insert the specimen into the Anti-Mass Spectrometer.
9.8%
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%
Well-Done
Cook a Grenade for too long.
17.6%
Rather an Anticlimax
Decline G-Man’s offer of employment.
15.4%
xen when
Wait too long to jump into the Lambda Teleporter.
3.8%
Our Brains And Your Brawn
Assemble all the possible Scientists and Guards at the end of Office Complex.
4.8%
Caffeine Extraction
Perform surgical caffeine extraction from 20 vending machines.
22.9%
Calculated Trajectory
Kill 10 airborne Headcrabs using the Shotgun.
14.0%
Centripetal Attraction
Kill 20 Enemies with the Hivehand.
24.2%
Contest Propellant
Find the snack supply canister.
10.2%
Unified Coupling Theorum
Help the Barnacle and Headcrab find true love.
6.4%
Black Mesa Decathlon Winner
Escape the Gargantua’s Lair without taking any damage from Gargantuas.
3.2%
Digital Wizardry
Kill 10 enemies with a reprogrammed Sentry.
9.3%
Doctor’s Signature
Deliver the finishing blow to Gonarch with your Crowbar.
3.0%
Ethically Questionable
Conduct all of the questionable research experiments.
5.6%