Playtime past 2 weeks:
1.9h

View global achievement stats
You must be logged in to compare these stats to your own
27 of 50 (54%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 17 Nov, 2017 @ 4:09am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 29 Nov, 2020 @ 8:36am

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 3 Jan, 2020 @ 10:52am

Convection Refinement

Ruin the microwave casserole.
Unlocked 27 Jun, 2017 @ 4:23am

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 22 Feb, 2020 @ 1:37am

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 2 Jan, 2020 @ 8:34pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 29 Jun, 2017 @ 5:26am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 4 Dec, 2017 @ 5:28am

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 3 Jan, 2020 @ 11:07am

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 17 Nov, 2017 @ 10:47am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 7 Aug, 2019 @ 1:40am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 17 Nov, 2017 @ 4:34am

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 27 Jun, 2017 @ 4:21am

Quantum Capacitance

Overcharge it anyway.
Unlocked 10 Aug, 2019 @ 7:40pm

Rare Specimen

Send the Hidden Hat to Xen.
Unlocked 16 Dec, 2017 @ 9:30am

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 28 Nov, 2022 @ 7:28am

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 11 Dec, 2019 @ 4:11pm

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 14 Mar, 2021 @ 11:50am

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Unlocked 26 May, 2020 @ 3:07am

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Unlocked 26 Nov, 2022 @ 10:05am

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 24 May, 2020 @ 10:05am

Gonad Glider

Get whacked into oblivion in the ledge fight.
Unlocked 28 Nov, 2022 @ 10:02am

Contest Propellant

Find the snack supply canister.
Unlocked 14 Mar, 2021 @ 10:57am

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Unlocked 14 Mar, 2021 @ 11:01am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 14 Mar, 2021 @ 10:56am

Late for Work

Defeat Nihilanth in under 4 minutes.​
Unlocked 14 Mar, 2021 @ 12:07pm

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 14 Mar, 2021 @ 12:11pm



Centripetal Attraction

Kill 20 Enemies with the Hivehand.

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

Ethically Questionable

Conduct all of the questionable research experiments.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Kinetic Repulsion

Kill a Marine with their own Grenade.

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.

Resonance Procrastinator

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

Universal Gravitation

Get killed by your own Snarks.

Prolific Popper

Kill all Protozoans in the Borderworld.

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.

Post-Mortem Interval

Find each member of the missing research teams.

Laser Immunization

Complete Interloper without taking any laser damage.

Specimen GG

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

Rather an Anticlimax

Decline G-Man’s offer of employment.

Well-Done

Cook a Grenade for too long.
+6

6 hidden achievements remaining

Details for each achievement will be revealed once unlocked