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28 of 50 (56%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 12 Nov, 2023 @ 4:17am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 13 Nov, 2023 @ 7:40am

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 2 Jul @ 9:45am

Convection Refinement

Ruin the microwave casserole.
Unlocked 12 Nov, 2023 @ 4:13am

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked 1 Jul @ 2:24am

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 2 Jul @ 11:16am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 30 Jun @ 11:46pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 30 Jun @ 2:27am

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 14 Nov, 2023 @ 5:19am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 2 Jul @ 7:40am

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 30 Jun @ 2:47am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 1 Jul @ 6:25am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 1 Jul @ 8:59am

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 30 Jun @ 12:34am

Quantum Capacitance

Overcharge it anyway.
Unlocked 1 Jul @ 2:20am

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 30 Jun @ 11:12am

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 12 Nov, 2023 @ 4:41am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 2 Jul @ 12:09pm

xen when

Wait too long to jump into the Lambda Teleporter.
Unlocked 1 Jul @ 7:38am

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 30 Jun @ 3:11am

Following the Rules

Use the welcome mat.
Unlocked 1 Jul @ 9:08am

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Unlocked 2 Jul @ 9:45am

Gonad Glider

Get whacked into oblivion in the ledge fight.
Unlocked 2 Jul @ 8:56am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 2 Jul @ 10:00am

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Unlocked 2 Jul @ 12:38pm

Late for Work

Defeat Nihilanth in under 4 minutes.​
Unlocked 2 Jul @ 12:41pm

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 2 Jul @ 12:46pm

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked 2 Jul @ 12:45pm



Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.

Dead Reckoning

Kill an Assassin with the .357 Magnum.

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Mega Hertz

Kill 5 Enemies with one Grenade.

Rare Specimen

Send the Hidden Hat to Xen.

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.

Universal Gravitation

Get killed by your own Snarks.

Prolific Popper

Kill all Protozoans in the Borderworld.

One Step Ahead

Kill 10 Enemies with Tripmines​​.

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.

Orbital Trajectory

Skip the opening Xen island with a secret jump.​

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.

Well-Done

Cook a Grenade for too long.
+5

5 hidden achievements remaining

Details for each achievement will be revealed once unlocked