Achievement Unlocked Visibility Global Unlocks
Centripetal Attraction
Kill 20 Enemies with the Hivehand. 		2024-03-14 06:29:46 24.2%
Calculated Trajectory
Kill 10 airborne Headcrabs using the Shotgun. 		2024-03-14 06:27:42 14.0%
Caffeine Extraction
Perform surgical caffeine extraction from 20 vending machines. 		2024-03-14 06:25:37 22.9%
Rather an Anticlimax
Decline G-Man’s offer of employment. 		2024-02-26 06:59:39 15.5%
Limitless Potential
Accept G-Man’s offer of employment. 		2024-02-26 06:56:38 23.7%
PhD in Pacifism
Don't kill any Vortigaunts in the Borderworld. 		2024-02-26 06:25:51 11.1%
Contest Propellant
Find the snack supply canister. 		2024-02-24 02:13:46
10.2%
Anti-Matter Over Mind
Kill a Controller without killing any of its mind-controlled Vortigaunt slaves. 		2024-02-24 02:12:55 26.4%
Premature Expulsion
Use an entire clip of Gluon ammo in one continuous shot. 		2024-02-22 19:19:19 26.3%
Well-Done
Cook a Grenade for too long. 		2023-11-27 15:54:20 17.6%
Mega Hertz
Kill 5 Enemies with one Grenade. 		2023-11-27 15:53:13 19.0%
Resonance Procrastinator
Refuse to insert the specimen into the Anti-Mass Spectrometer. 		2023-11-27 15:40:35 9.8%
Less Than Desirable Consequences
Die in the AMS Beam before starting the experiment. 		2023-11-27 15:37:30 14.1%
Proverbial Tinkerer
Interfere with the alarm and laptop in Anomalous Materials. 		2023-11-27 15:32:18 17.0%
Permeable Infrastructure
Use the alternate path in Office Complex. 		2023-11-27 07:57:32 24.1%
Inflammatory Actions
Kill a Headcrab using fire. 		2023-11-27 07:39:41 25.6%
Brownian Motion
Pass the toilet paper to the Scientist in need. 		2023-06-29 21:23:06 62.5%
Prophylactic Suggested
Get overtaken by a Headcrab's ample anterior. 		2020-03-27 21:18:31 34.4%
Quantum Capacitance
Overcharge it anyway. 		2018-08-22 05:01:52 19.7%
Gray Matter Propulsion
Headshot 20 Enemies with the .357 Magnum. 		2018-08-22 04:49:49 38.7%
Dead Reckoning
Kill an Assassin with the .357 Magnum. 		2018-08-07 06:56:58 23.3%
Convection Refinement
Ruin the microwave casserole. 		2018-06-30 19:35:39 51.2%
Late for Work
Defeat Nihilanth in under 4 minutes.​ 		2.9%
Doctor’s Signature
Deliver the finishing blow to Gonarch with your Crowbar. 		3.0%
Digital Wizardry
Kill 10 enemies with a reprogrammed Sentry. 		9.3%
Futile Resistance
Kill 10 Enemies with Snarks. 		7.2%
Black Mesa Decathlon Winner
Escape the Gargantua’s Lair without taking any damage from Gargantuas. 		3.2%
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.​ 		3.6%
Post-Mortem Interval
Find each member of the missing research teams. 		1.8%
Pepperoni Precipitation
View the *other* secret ending.
1.6%
Unified Coupling Theorum
Help the Barnacle and Headcrab find true love. 		6.4%
Prolific Popper
Kill all Protozoans in the Borderworld. 		1.7%
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%
Ethically Questionable
Conduct all of the questionable research experiments. 		5.6%
xen when
Wait too long to jump into the Lambda Teleporter.
3.8%
Following the Rules
Use the welcome mat.
3.6%
Universal Gravitation
Get killed by your own Snarks. 		11.1%
Gonad Glider
Get whacked into oblivion in the ledge fight. 		5.6%
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%