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

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 28 Apr, 2020 @ 1:29am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 28 Apr, 2020 @ 11:52pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 17 Nov @ 3:01am

Convection Refinement

Ruin the microwave casserole.
Unlocked 28 Apr, 2020 @ 1:29am

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 17 Nov @ 4:33am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 17 Nov @ 3:13am

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 20 Nov @ 5:31am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 28 Apr, 2020 @ 1:56am

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 12 Nov @ 9:58pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 12 Nov @ 3:27am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 18 Nov @ 2:55pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 20 Nov @ 5:20am

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 12 Nov @ 1:49am

Quantum Capacitance

Overcharge it anyway.
Unlocked 20 Nov @ 5:24am

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 20 Nov @ 5:29am

Universal Gravitation

Get killed by your own Snarks.
Unlocked 20 Nov @ 5:21am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 20 Nov @ 3:10am

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Unlocked 18 Nov @ 12:11pm

xen when

Wait too long to jump into the Lambda Teleporter.
Unlocked 19 Nov @ 6:40am

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 12 Nov @ 3:55am

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 28 Apr, 2020 @ 1:40am

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Unlocked 20 Nov @ 5:36am

Contest Propellant

Find the snack supply canister.
Unlocked 20 Nov @ 12:03am

Laser Immunization

Complete Interloper without taking any laser damage.
Unlocked 20 Nov @ 3:10am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 20 Nov @ 12:02am

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 20 Nov @ 3:50am

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked 20 Nov @ 3:55am

Well-Done

Cook a Grenade for too long.
Unlocked 20 Nov @ 5:20am



Centripetal Attraction

Kill 20 Enemies with the Hivehand.

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

Ethically Questionable

Conduct all of the questionable research experiments.

Futile Resistance

Kill 10 Enemies with Snarks.

Mega Hertz

Kill 5 Enemies with one Grenade.

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.

Rare Specimen

Send the Hidden Hat to Xen.

Resonance Procrastinator

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

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.

Prolific Popper

Kill all Protozoans in the Borderworld.

One Step Ahead

Kill 10 Enemies with Tripmines​​.

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.

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.​
+5

5 hidden achievements remaining

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