Playtime past 2 weeks:
0h

View global achievement stats
You must be logged in to compare these stats to your own
23 of 50 (46%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 6 Oct, 2015 @ 3:46pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 6 Oct, 2015 @ 5:26pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 10 Feb @ 5:16am

Convection Refinement

Ruin the microwave casserole.
Unlocked 6 Oct, 2015 @ 3:42pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 10 Feb @ 4:08am

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked 8 Oct, 2015 @ 6:40pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 7 Oct, 2015 @ 2:53pm

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 10 Feb @ 4:20am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 5 Feb @ 8:10pm

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 2 Apr, 2023 @ 6:57pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 22 Jul, 2021 @ 6:08am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 3 Apr, 2023 @ 12:30pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 2 Feb @ 5:00pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 6 Oct, 2015 @ 3:35pm

Quantum Capacitance

Overcharge it anyway.
Unlocked 6 Feb @ 1:48am

Rare Specimen

Send the Hidden Hat to Xen.
Unlocked 10 Feb @ 5:16am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 3 Apr, 2023 @ 12:51pm

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Unlocked 10 Feb @ 3:36am

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 5 Feb @ 8:01pm

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Unlocked 10 Feb @ 5:22am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 3 Apr, 2023 @ 11:24am

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 3 Apr, 2023 @ 1:18pm

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked 3 Apr, 2023 @ 1:23pm



Centripetal Attraction

Kill 20 Enemies with the Hivehand.

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

Futile Resistance

Kill 10 Enemies with Snarks.

Kinetic Repulsion

Kill a Marine with their own Grenade.

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.

Remote Detonation

Kill a Barnacle with a Satchel.

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.

Universal Gravitation

Get killed by your own Snarks.

Prolific Popper

Kill all Protozoans in the Borderworld.

One Step Ahead

Kill 10 Enemies with Tripmines​​.

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.

Gonad Glider

Get whacked into oblivion in the ledge fight.

Post-Mortem Interval

Find each member of the missing research teams.

Laser Immunization

Complete Interloper without taking any laser damage.

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.

Late for Work

Defeat Nihilanth in under 4 minutes.​

Well-Done

Cook a Grenade for too long.
+7

7 hidden achievements remaining

Details for each achievement will be revealed once unlocked