| Achievement | Unlocked | Visibility | Global Unlocks | |
|---|---|---|---|---|
|
Prolific Popper
Kill all Protozoans in the Borderworld. |
2021-05-15 06:52:09 | 1.7% | ||
|
Pepperoni Precipitation
View the *other* secret ending. |
2021-05-08 04:55:23 | 1.6% | ||
|
The Rarest Specimen
Carry the Hidden Hat to Endgame. |
2021-05-02 05:05:37 | 1.8% | ||
|
Post-Mortem Interval
Find each member of the missing research teams. |
2021-04-26 04:43:57 | 1.8% | ||
|
Unquestionably Ethical
Don't use the Cyanogen and let the Gonarch live. |
2021-04-20 04:40:59 | 2.1% | ||
|
The Plan
Use Cyanogen to kill Gonarch. |
2021-04-14 05:03:55 | 2.2% | ||
|
Laser Immunization
Complete Interloper without taking any laser damage. |
2021-04-07 04:36:35 | 2.2% | ||
|
Late for Work
Defeat Nihilanth in under 4 minutes. |
2021-04-01 05:04:35 | 2.9% | ||
|
Specimen GG
Take out all three Healing Crystals in Nihilanth’s Chamber at the same time. |
2021-03-26 05:13:26 | 2.8% | ||
|
xen when
Wait too long to jump into the Lambda Teleporter. |
2021-03-20 06:58:10 | 3.8% | ||
|
Doctor’s Signature
Deliver the finishing blow to Gonarch with your Crowbar. |
2021-03-15 05:39:54 | 3.0% | ||
|
Black Mesa Decathlon Winner
Escape the Gargantua’s Lair without taking any damage from Gargantuas. |
2021-03-10 12:42:08 | 3.2% | ||
|
Following the Rules
Use the welcome mat. |
2021-03-05 06:05:27 | 3.6% | ||
|
Orbital Trajectory
Skip the opening Xen island with a secret jump. |
2021-02-28 06:03:39 | 3.6% | ||
|
Our Brains And Your Brawn
Assemble all the possible Scientists and Guards at the end of Office Complex. |
2021-02-23 05:12:41 | 4.8% | ||
|
One Step Ahead
Kill 10 Enemies with Tripmines. |
2021-02-17 05:27:16 | 5.8% | ||
|
Gonad Glider
Get whacked into oblivion in the ledge fight. |
2021-02-12 05:51:28 | 5.6% | ||
|
Stealth Technology
Escape the Hangar in Surface Tension without alerting the Soldiers. |
2021-02-06 06:44:21 | 10.1% | ||
|
Contest Propellant
Find the snack supply canister. |
2021-02-02 05:54:10 | 10.2% | ||
|
PhD in Pacifism
Don't kill any Vortigaunts in the Borderworld. |
2021-01-29 05:18:23 | 11.1% | ||
|
Less Than Desirable Consequences
Die in the AMS Beam before starting the experiment. |
2021-01-26 05:48:01 | 14.1% | ||
|
Rather an Anticlimax
Decline G-Man’s offer of employment. |
2021-01-23 05:19:36 | 15.5% | ||
|
Well-Done
Cook a Grenade for too long. |
2021-01-20 06:03:02 | 17.7% | ||
|
Limitless Potential
Accept G-Man’s offer of employment. |
2021-01-17 08:11:52 | 23.7% | ||
|
Anti-Matter Over Mind
Kill a Controller without killing any of its mind-controlled Vortigaunt slaves. |
2021-01-14 05:50:17 | 26.5% | ||
|
Rare Specimen
Send the Hidden Hat to Xen. |
2018-07-04 04:12:21 | 2.8% | ||
|
Kinetic Repulsion
Kill a Marine with their own Grenade. |
2018-07-01 03:50:19 | 6.0% | ||
|
Unified Coupling Theorum
Help the Barnacle and Headcrab find true love. |
2018-06-28 04:19:37 | 6.4% | ||
|
Premature Expulsion
Use an entire clip of Gluon ammo in one continuous shot. |
2018-06-25 03:39:59 | 26.4% | ||
|
Futile Resistance
Kill 10 Enemies with Snarks. |
2018-06-22 04:12:07 | 7.2% | ||
|
Ethically Questionable
Conduct all of the questionable research experiments. |
2018-06-19 04:08:14 | 5.6% | ||
|
Nuclear Fishin'
Kill an Ichthyosaur with either the Tau or Gluon. |
2018-06-16 05:18:43 | 12.5% | ||
|
Mega Hertz
Kill 5 Enemies with one Grenade. |
2018-06-13 04:17:31 | 19.0% | ||
|
Digital Wizardry
Kill 10 enemies with a reprogrammed Sentry. |
2018-06-10 06:15:37 | 9.3% | ||
|
Quantum Capacitance
Overcharge it anyway. |
2018-06-07 04:12:00 | 19.7% | ||
|
Permeable Infrastructure
Use the alternate path in Office Complex. |
2018-06-04 03:55:34 | 24.1% | ||
|
Inflammatory Actions
Kill a Headcrab using fire. |
2018-05-19 03:40:53 | 25.6% | ||
|
Hyper Saturation Conundrum
Drown in Lambda Core's coolant. |
2018-05-17 15:12:36 | 6.3% | ||
|
Remote Detonation
Kill a Barnacle with a Satchel. |
2018-05-17 15:04:45 | 11.5% | ||
|
Dead Reckoning
Kill an Assassin with the .357 Magnum. |
2018-05-13 06:29:28 | 23.4% | ||
|
Caffeine Extraction
Perform surgical caffeine extraction from 20 vending machines. |
2018-04-23 07:20:18 | 22.9% | ||
|
Universal Gravitation
Get killed by your own Snarks. |
2018-03-29 17:59:43 | 11.1% | ||
|
Centripetal Attraction
Kill 20 Enemies with the Hivehand. |
2018-03-29 17:46:41 | 24.2% | ||
|
Calculated Trajectory
Kill 10 airborne Headcrabs using the Shotgun. |
2018-02-21 17:53:50 | 14.0% | ||
|
Prophylactic Suggested
Get overtaken by a Headcrab's ample anterior. |
2018-02-21 17:22:18 | 34.4% | ||
|
Gray Matter Propulsion
Headshot 20 Enemies with the .357 Magnum. |
2018-02-04 18:15:49 | 38.7% | ||
|
Resonance Procrastinator
Refuse to insert the specimen into the Anti-Mass Spectrometer. |
2017-05-17 07:19:55 | 9.8% | ||
|
Proverbial Tinkerer
Interfere with the alarm and laptop in Anomalous Materials. |
2017-05-17 07:09:47 | 17.1% | ||
|
Convection Refinement
Ruin the microwave casserole. |
2017-05-17 07:06:44 | 51.2% | ||
|
Brownian Motion
Pass the toilet paper to the Scientist in need. |
2017-05-17 07:04:35 | 62.5% |