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34 of 50 (68%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 5 Jan, 2023 @ 1:22pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 6 Jan, 2023 @ 1:52pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 6 Jan, 2023 @ 2:39pm

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 9 Jan, 2023 @ 11:23am

Convection Refinement

Ruin the microwave casserole.
Unlocked 5 Jan, 2023 @ 1:19pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 7 Jan, 2023 @ 1:57pm

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 7 Jan, 2023 @ 7:06am

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked 7 Jan, 2023 @ 3:26pm

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 9 Jan, 2023 @ 9:47am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 7 Jan, 2023 @ 9:41am

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 9 Jan, 2023 @ 1:00pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 6 Jan, 2023 @ 1:51pm

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 7 Jan, 2023 @ 7:21am

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 7 Jan, 2023 @ 3:02pm

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 7 Jan, 2023 @ 4:08pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 6 Jan, 2023 @ 2:20pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 9 Jan, 2023 @ 12:52pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 6 Jan, 2023 @ 2:13pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 5 Jan, 2023 @ 2:56pm

Quantum Capacitance

Overcharge it anyway.
Unlocked 7 Jan, 2023 @ 3:19pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 7 Jan, 2023 @ 8:21am

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 5 Jan, 2023 @ 2:52pm

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 7 Jan, 2023 @ 8:38am

Universal Gravitation

Get killed by your own Snarks.
Unlocked 7 Jan, 2023 @ 3:27pm

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 15 Jan, 2023 @ 5:02am

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Unlocked 7 Jan, 2023 @ 1:52pm

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Unlocked 9 Jan, 2023 @ 11:46am

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 6 Jan, 2023 @ 2:50pm

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Unlocked 9 Jan, 2023 @ 2:07pm

Following the Rules

Use the welcome mat.
Unlocked 9 Jan, 2023 @ 2:32pm

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Unlocked 14 Jan, 2023 @ 12:47pm

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 14 Jan, 2023 @ 1:07pm

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 15 Jan, 2023 @ 5:41am

Well-Done

Cook a Grenade for too long.
Unlocked 7 Jan, 2023 @ 7:16am



Rare Specimen

Send the Hidden Hat to Xen.

Prolific Popper

Kill all Protozoans in the Borderworld.

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.

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.​

Rather an Anticlimax

Decline G-Man’s offer of employment.
+6

6 hidden achievements remaining

Details for each achievement will be revealed once unlocked