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15 of 50 (30%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 30 Jun @ 6:57am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 7 Oct @ 5:59am

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 11 Oct @ 1:12am

Convection Refinement

Ruin the microwave casserole.
Unlocked 30 Jun @ 6:50am

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 11 Oct @ 12:14am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 7 Oct @ 5:33am

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 19 Dec @ 4:38am

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 7 Oct @ 4:52am

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 21 Aug @ 4:22am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 12 Sep @ 12:19pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 7 Oct @ 3:15am

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 19 Dec @ 2:25am

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 7 Oct @ 6:56am

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 7 Oct @ 3:37am

Well-Done

Cook a Grenade for too long.
Unlocked 21 Jul @ 6:24am



Centripetal Attraction

Kill 20 Enemies with the Hivehand.

Dead Reckoning

Kill an Assassin with the .357 Magnum.

Ethically Questionable

Conduct all of the questionable research experiments.

Futile Resistance

Kill 10 Enemies with Snarks.

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.

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.

Quantum Capacitance

Overcharge it anyway.

Rare Specimen

Send the Hidden Hat to Xen.

Remote Detonation

Kill a Barnacle with a Satchel.

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.

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.

One Step Ahead

Kill 10 Enemies with Tripmines​​.

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

Details for each achievement will be revealed once unlocked