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24 of 50 (48%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 27 Apr, 2017 @ 1:28pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 7 Dec @ 8:23pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 8 Dec @ 7:47am

Convection Refinement

Ruin the microwave casserole.
Unlocked 27 Apr, 2017 @ 1:25pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 9 Dec @ 4:47pm

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 7 Dec @ 9:59pm

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked 13 Dec @ 4:54pm

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 13 Dec @ 4:46pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 8 Dec @ 1:29pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 6 Dec @ 6:21pm

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 8 Dec @ 7:29am

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 6 Dec @ 6:45pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 7 Dec @ 8:55pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 6 Dec @ 6:00pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 6 Dec @ 5:14pm

Quantum Capacitance

Overcharge it anyway.
Unlocked 13 Dec @ 4:49pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 8 Dec @ 12:27pm

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 6 Dec @ 5:53pm

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 8 Dec @ 7:41am

Universal Gravitation

Get killed by your own Snarks.
Unlocked 12 Dec @ 6:27pm

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Unlocked 8 Dec @ 1:18pm

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 7 Dec @ 9:37pm

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 6 Dec @ 5:50pm

Well-Done

Cook a Grenade for too long.
Unlocked 7 Dec @ 8:25pm



Centripetal Attraction

Kill 20 Enemies with the Hivehand.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.

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.​

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.

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.

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.
+7

7 hidden achievements remaining

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