Playtime past 2 weeks:
0h

View global achievement stats
You must be logged in to compare these stats to your own
50 of 50 (100%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 9 Jul, 2022 @ 2:57pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 9 Jul, 2022 @ 4:38pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 10 Jul, 2022 @ 3:32am

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 11 Jul, 2022 @ 7:35am

Convection Refinement

Ruin the microwave casserole.
Unlocked 9 Jul, 2022 @ 2:55pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 10 Jul, 2022 @ 10:14am

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 12 Jul, 2022 @ 6:01am

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked 10 Jul, 2022 @ 11:36am

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 11 Jul, 2022 @ 4:57pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 10 Jul, 2022 @ 4:48am

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 16 Jul, 2022 @ 12:36pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 13 Jul, 2022 @ 6:17am

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 10 Jul, 2022 @ 7:53am

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 9 Jul, 2022 @ 4:36pm

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 10 Jul, 2022 @ 1:06pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 9 Jul, 2022 @ 4:26pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 12 Jul, 2022 @ 6:39am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 10 Jul, 2022 @ 3:22am

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 15 Jul, 2022 @ 9:49am

Quantum Capacitance

Overcharge it anyway.
Unlocked 10 Jul, 2022 @ 11:32am

Rare Specimen

Send the Hidden Hat to Xen.
Unlocked 16 Jul, 2022 @ 12:56pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 10 Jul, 2022 @ 3:47am

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 15 Jul, 2022 @ 10:02am

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 16 Jul, 2022 @ 7:05am

Universal Gravitation

Get killed by your own Snarks.
Unlocked 10 Jul, 2022 @ 11:25am

Prolific Popper

Kill all Protozoans in the Borderworld.
Unlocked 19 Jul, 2022 @ 11:25am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 15 Jul, 2022 @ 7:17am

The Rarest Specimen

Carry the Hidden Hat to Endgame.
Unlocked 22 Jul, 2022 @ 2:44pm

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Unlocked 11 Jul, 2022 @ 7:35am

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Unlocked 11 Jul, 2022 @ 5:38pm

xen when

Wait too long to jump into the Lambda Teleporter.
Unlocked 12 Jul, 2022 @ 5:00pm

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 15 Jul, 2022 @ 10:46am

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 15 Jul, 2022 @ 9:59am

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Unlocked 16 Jul, 2022 @ 1:01pm

Following the Rules

Use the welcome mat.
Unlocked 13 Jul, 2022 @ 6:15am

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Unlocked 14 Jul, 2022 @ 6:05am

Gonad Glider

Get whacked into oblivion in the ledge fight.
Unlocked 14 Jul, 2022 @ 5:03am

Post-Mortem Interval

Find each member of the missing research teams.
Unlocked 19 Jul, 2022 @ 11:25am

The Plan

Use Cyanogen to kill Gonarch.
Unlocked 19 Jul, 2022 @ 11:26am

Unquestionably Ethical

Don't use the Cyanogen and let the Gonarch live.
Unlocked 19 Jul, 2022 @ 11:27am

Contest Propellant

Find the snack supply canister.
Unlocked 14 Jul, 2022 @ 10:46am

Laser Immunization

Complete Interloper without taking any laser damage.
Unlocked 15 Jul, 2022 @ 7:17am

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Unlocked 14 Jul, 2022 @ 11:01am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 14 Jul, 2022 @ 10:39am

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Unlocked 15 Jul, 2022 @ 7:46am

Late for Work

Defeat Nihilanth in under 4 minutes.​
Unlocked 15 Jul, 2022 @ 7:47am

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 15 Jul, 2022 @ 7:58am

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked 22 Jul, 2022 @ 2:37pm

Pepperoni Precipitation

View the *other* secret ending.
Unlocked 15 Jul, 2022 @ 7:53am

Well-Done

Cook a Grenade for too long.
Unlocked 10 Jul, 2022 @ 8:07am