Playtime past 2 weeks:
0h

View global achievement stats
You must be logged in to compare these stats to your own
20 of 50 (40%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 3 Nov, 2021 @ 11:43pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 1 Dec, 2024 @ 1:47pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 25 Nov, 2023 @ 2:08pm

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 24 Feb, 2022 @ 5:32pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 3 Nov, 2021 @ 11:42pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 17 Aug, 2021 @ 9:28pm

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 17 Apr, 2024 @ 2:03pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 17 Aug, 2021 @ 9:15pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 6 Jul, 2022 @ 10:59pm

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 15 Dec, 2019 @ 8:27am

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 9 Feb, 2022 @ 11:10pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 28 Feb, 2022 @ 12:16am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 13 Aug, 2021 @ 11:12pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 3 Nov, 2021 @ 11:40pm

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 26 Feb, 2022 @ 2:33pm

Universal Gravitation

Get killed by your own Snarks.
Unlocked 17 Apr, 2024 @ 2:03pm

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Unlocked 26 Feb, 2022 @ 1:09am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 21 Oct, 2020 @ 3:17pm

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 23 Mar, 2020 @ 12:19pm

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked 28 Feb, 2022 @ 12:39am



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.

Quantum Capacitance

Overcharge it anyway.

Rare Specimen

Send the Hidden Hat to Xen.

Remote Detonation

Kill a Barnacle with a Satchel.

Resonance Procrastinator

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

Prolific Popper

Kill all Protozoans in the Borderworld.

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.

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.

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