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29 of 50 (58%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 16 May, 2023 @ 6:57pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 18 Feb @ 6:42am

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 22 Feb @ 12:00am

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 18 Feb @ 12:33pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 16 May, 2023 @ 6:56pm

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 20 Feb @ 8:39am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 21 Jun, 2023 @ 5:36pm

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 20 Feb @ 9:09am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 16 May, 2023 @ 7:32pm

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 17 Feb @ 9:01pm

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 23 Feb @ 8:24am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 18 Feb @ 7:26am

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 16 May, 2023 @ 8:09pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 21 Feb @ 11:10pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 17 Feb @ 6:54pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 16 May, 2023 @ 6:50pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 21 Feb @ 11:09pm

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 17 Feb @ 5:25pm

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 22 Feb @ 12:46pm

Universal Gravitation

Get killed by your own Snarks.
Unlocked 18 Feb @ 6:54am

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Unlocked 17 Feb @ 9:22pm

xen when

Wait too long to jump into the Lambda Teleporter.
Unlocked 21 Feb @ 11:49pm

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 16 May, 2023 @ 8:32pm

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 17 Feb @ 5:21pm

Following the Rules

Use the welcome mat.
Unlocked 21 Feb @ 11:57pm

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Unlocked 23 Feb @ 8:39am

Gonad Glider

Get whacked into oblivion in the ledge fight.
Unlocked 22 Feb @ 12:32pm

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 24 Feb @ 6:12pm

Well-Done

Cook a Grenade for too long.
Unlocked 17 Feb @ 9:01pm



Dead Reckoning

Kill an Assassin with the .357 Magnum.

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

Ethically Questionable

Conduct all of the questionable research experiments.

Quantum Capacitance

Overcharge it anyway.

Rare Specimen

Send the Hidden Hat to Xen.

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.

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.

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.
+5

5 hidden achievements remaining

Details for each achievement will be revealed once unlocked