Playtime past 2 weeks:
0h

View global achievement stats
You must be logged in to compare these stats to your own
24 of 50 (48%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 5 May, 2015 @ 3:37pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 6 May, 2015 @ 3:04pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 23 May, 2015 @ 9:23pm

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 31 May, 2015 @ 7:28pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 5 May, 2015 @ 3:35pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 3 Jun, 2015 @ 9:42pm

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 4 Dec, 2023 @ 1:50am

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked 24 May, 2015 @ 8:55pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 6 May, 2015 @ 3:48pm

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 16 Apr, 2022 @ 3:26am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 23 May, 2015 @ 10:08pm

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 6 May, 2015 @ 3:19pm

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 23 May, 2015 @ 9:10pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 6 May, 2015 @ 3:16pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 3 Jun, 2015 @ 9:54pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 23 May, 2015 @ 10:12pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 5 May, 2015 @ 3:29pm

Quantum Capacitance

Overcharge it anyway.
Unlocked 21 May, 2015 @ 6:27pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 3 Jun, 2015 @ 10:01pm

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 23 May, 2015 @ 9:50pm

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 17 Sep, 2021 @ 10:44pm

Universal Gravitation

Get killed by your own Snarks.
Unlocked 31 May, 2015 @ 7:27pm

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Unlocked 1 Mar, 2020 @ 6:22pm

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 17 Mar, 2020 @ 1:44pm



Futile Resistance

Kill 10 Enemies with Snarks.

Kinetic Repulsion

Kill a Marine with their own Grenade.

Rare Specimen

Send the Hidden Hat to Xen.

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​​.

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.

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