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22 of 50 (44%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 25 Dec, 2018 @ 10:47pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 27 Dec, 2018 @ 10:04pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 20 Apr, 2021 @ 2:42am

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 6 Feb, 2021 @ 11:08pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 25 Dec, 2018 @ 10:44pm

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 19 Oct @ 6:12pm

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 23 Apr, 2020 @ 5:04am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 28 Dec, 2018 @ 12:09am

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 20 Apr, 2021 @ 2:48am

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 30 Dec, 2018 @ 11:51pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 27 Dec, 2018 @ 10:17pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 6 Jan, 2019 @ 1:56am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 27 Dec, 2018 @ 10:06pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 25 Dec, 2018 @ 10:41pm

Quantum Capacitance

Overcharge it anyway.
Unlocked 28 Dec, 2018 @ 3:34pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 6 Feb, 2021 @ 11:48pm

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 31 Dec, 2018 @ 9:52am

Universal Gravitation

Get killed by your own Snarks.
Unlocked 30 Dec, 2018 @ 3:45pm

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 24 Oct @ 6:01pm

Contest Propellant

Find the snack supply canister.
Unlocked 7 Feb, 2021 @ 1:41pm

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 7 Feb, 2021 @ 1:38pm

Well-Done

Cook a Grenade for too long.
Unlocked 20 Apr, 2021 @ 2:18am



Dead Reckoning

Kill an Assassin with the .357 Magnum.

Ethically Questionable

Conduct all of the questionable research experiments.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Inflammatory Actions

Kill a Headcrab using fire.

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.

Rare Specimen

Send the Hidden Hat to Xen.

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.

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.

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.
+6

6 hidden achievements remaining

Details for each achievement will be revealed once unlocked