| Achievement | Unlocked | Visibility | Global Unlocks | |
|---|---|---|---|---|
|
xen when
Wait too long to jump into the Lambda Teleporter. |
2020-03-18 01:52:56 | 3.8% | ||
|
Prolific Popper
Kill all Protozoans in the Borderworld. |
2020-03-07 01:56:28 | 1.7% | ||
|
PhD in Pacifism
Don't kill any Vortigaunts in the Borderworld. |
2020-03-06 20:36:42 | 11.0% | ||
|
Post-Mortem Interval
Find each member of the missing research teams. |
2020-03-06 03:15:02 | 1.8% | ||
|
Gonad Glider
Get whacked into oblivion in the ledge fight. |
2020-03-06 02:16:12 | 5.5% | ||
|
Our Brains And Your Brawn
Assemble all the possible Scientists and Guards at the end of Office Complex. |
2020-03-06 00:01:13 | 4.8% | ||
|
Laser Immunization
Complete Interloper without taking any laser damage. |
2020-03-05 23:21:20 | 2.2% | ||
|
Black Mesa Decathlon Winner
Escape the Gargantua’s Lair without taking any damage from Gargantuas. |
2020-03-05 18:55:41 | 3.2% | ||
|
Doctor’s Signature
Deliver the finishing blow to Gonarch with your Crowbar. |
2020-03-05 17:44:21 | 3.0% | ||
|
Unquestionably Ethical
Don't use the Cyanogen and let the Gonarch live. |
2020-03-05 17:35:58 | 2.0% | ||
|
The Plan
Use Cyanogen to kill Gonarch. |
2020-03-05 02:08:28 | 2.2% | ||
|
Orbital Trajectory
Skip the opening Xen island with a secret jump. |
2020-03-05 01:24:11 | 3.5% | ||
|
Less Than Desirable Consequences
Die in the AMS Beam before starting the experiment. |
2020-03-05 01:18:27 | 14.0% | ||
|
Late for Work
Defeat Nihilanth in under 4 minutes. |
2020-03-05 01:08:52 | 2.9% | ||
|
Specimen GG
Take out all three Healing Crystals in Nihilanth’s Chamber at the same time. |
2020-03-05 01:07:49 | 2.8% | ||
|
Pepperoni Precipitation
View the *other* secret ending. |
2020-03-04 22:06:07 | 1.6% | ||
|
Rather an Anticlimax
Decline G-Man’s offer of employment. |
2020-03-04 21:55:32 | 15.4% | ||
|
The Rarest Specimen
Carry the Hidden Hat to Endgame. |
2020-03-04 21:53:23 | 1.8% | ||
|
Limitless Potential
Accept G-Man’s offer of employment. |
2020-03-04 20:31:43 | 23.6% | ||
|
Contest Propellant
Find the snack supply canister. |
2020-03-04 01:30:02 | 10.1% | ||
|
Anti-Matter Over Mind
Kill a Controller without killing any of its mind-controlled Vortigaunt slaves. |
2020-03-04 01:27:19 | 26.3% | ||
|
Well-Done
Cook a Grenade for too long. |
2020-03-03 18:33:11 | 17.6% | ||
|
Following the Rules
Use the welcome mat. |
2020-03-03 18:23:55 | 3.5% | ||
|
Stealth Technology
Escape the Hangar in Surface Tension without alerting the Soldiers. |
2020-03-03 01:17:12 | 10.0% | ||
|
One Step Ahead
Kill 10 Enemies with Tripmines. |
2020-02-28 20:21:16 | 5.7% | ||
|
Rare Specimen
Send the Hidden Hat to Xen. |
2017-05-03 19:14:34 | 2.8% | ||
|
Hyper Saturation Conundrum
Drown in Lambda Core's coolant. |
2017-05-03 17:28:11 | 6.3% | ||
|
Premature Expulsion
Use an entire clip of Gluon ammo in one continuous shot. |
2017-05-03 17:20:03 | 26.2% | ||
|
Centripetal Attraction
Kill 20 Enemies with the Hivehand. |
2017-05-02 23:05:28 | 24.1% | ||
|
Nuclear Fishin'
Kill an Ichthyosaur with either the Tau or Gluon. |
2017-05-02 21:17:26 | 12.4% | ||
|
Ethically Questionable
Conduct all of the questionable research experiments. |
2017-05-02 19:45:59 | 5.6% | ||
|
Quantum Capacitance
Overcharge it anyway. |
2017-05-02 19:41:39 | 19.7% | ||
|
Futile Resistance
Kill 10 Enemies with Snarks. |
2017-05-02 19:00:36 | 7.2% | ||
|
Universal Gravitation
Get killed by your own Snarks. |
2017-05-02 18:58:15 | 11.1% | ||
|
Dead Reckoning
Kill an Assassin with the .357 Magnum. |
2017-05-02 16:59:39 | 23.3% | ||
|
Remote Detonation
Kill a Barnacle with a Satchel. |
2017-04-29 16:32:21 | 11.4% | ||
|
Calculated Trajectory
Kill 10 airborne Headcrabs using the Shotgun. |
2017-04-28 23:34:46 | 14.0% | ||
|
Kinetic Repulsion
Kill a Marine with their own Grenade. |
2017-04-28 23:23:11 | 6.0% | ||
|
Digital Wizardry
Kill 10 enemies with a reprogrammed Sentry. |
2017-04-28 23:20:11 | 9.3% | ||
|
Gray Matter Propulsion
Headshot 20 Enemies with the .357 Magnum. |
2017-04-28 23:13:04 | 38.6% | ||
|
Unified Coupling Theorum
Help the Barnacle and Headcrab find true love. |
2017-04-28 23:07:49 | 6.4% | ||
|
Mega Hertz
Kill 5 Enemies with one Grenade. |
2017-04-28 22:27:01 | 18.9% | ||
|
Permeable Infrastructure
Use the alternate path in Office Complex. |
2017-04-28 22:18:32 | 24.0% | ||
|
Caffeine Extraction
Perform surgical caffeine extraction from 20 vending machines. |
2017-04-28 22:01:39 | 22.9% | ||
|
Prophylactic Suggested
Get overtaken by a Headcrab's ample anterior. |
2017-04-28 21:33:12 | 34.4% | ||
|
Inflammatory Actions
Kill a Headcrab using fire. |
2017-04-28 17:10:52 | 25.5% | ||
|
Resonance Procrastinator
Refuse to insert the specimen into the Anti-Mass Spectrometer. |
2017-04-28 16:49:17 | 9.8% | ||
|
Brownian Motion
Pass the toilet paper to the Scientist in need. |
2017-04-28 16:39:32 | 62.5% | ||
|
Convection Refinement
Ruin the microwave casserole. |
2017-04-28 16:39:06 | 51.2% | ||
|
Proverbial Tinkerer
Interfere with the alarm and laptop in Anomalous Materials. |
2017-04-28 16:38:09 | 17.0% |