Playtime past 2 weeks:
0h

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

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 21 Dec, 2017 @ 6:00am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 21 Dec, 2017 @ 6:21am

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 21 Dec, 2017 @ 5:20pm

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 30 Dec, 2017 @ 6:47pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 21 Dec, 2017 @ 6:05am

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 21 Dec, 2017 @ 11:29pm

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 21 Dec, 2017 @ 5:19pm

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked 22 Dec, 2017 @ 5:46am

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 30 Dec, 2017 @ 7:14pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 21 Dec, 2017 @ 4:32pm

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 30 Dec, 2017 @ 10:14pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 21 Dec, 2017 @ 6:12am

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 21 Dec, 2017 @ 5:30pm

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 21 Dec, 2017 @ 6:47am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 22 Dec, 2017 @ 6:23am

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 21 Dec, 2017 @ 4:36pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 30 Dec, 2017 @ 10:09pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 21 Dec, 2017 @ 6:11am

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 21 Dec, 2017 @ 6:07am

Quantum Capacitance

Overcharge it anyway.
Unlocked 22 Dec, 2017 @ 5:45am

Rare Specimen

Send the Hidden Hat to Xen.
Unlocked 30 Dec, 2017 @ 11:09pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 21 Dec, 2017 @ 6:28pm

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 21 Dec, 2017 @ 6:20am

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 21 Dec, 2017 @ 6:30am

Universal Gravitation

Get killed by your own Snarks.
Unlocked 30 Dec, 2017 @ 7:11pm



Prolific Popper

Kill all Protozoans in the Borderworld.

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.

One Step Ahead

Kill 10 Enemies with Tripmines​​.

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.

Our Brains And Your Brawn

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

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.

Orbital Trajectory

Skip the opening Xen island with a secret jump.​

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.

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.

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.​

Limitless Potential

Accept G-Man’s offer of employment.

Rather an Anticlimax

Decline G-Man’s offer of employment.

Well-Done

Cook a Grenade for too long.
+7

7 hidden achievements remaining

Details for each achievement will be revealed once unlocked