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16 of 50 (32%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 25 Jun, 2022 @ 3:41pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 27 Jun, 2022 @ 1:35pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 25 Jun, 2022 @ 3:40pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 29 Jun, 2022 @ 4:27am

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 29 Jun, 2022 @ 5:22am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 29 Jun, 2022 @ 6:38am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 28 Jun, 2022 @ 12:03pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 26 Jun, 2022 @ 4:28am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 4 Jul, 2022 @ 1:15pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 25 Jun, 2022 @ 3:34pm

Quantum Capacitance

Overcharge it anyway.
Unlocked 28 Jun, 2022 @ 12:02pm

Universal Gravitation

Get killed by your own Snarks.
Unlocked 29 Jun, 2022 @ 3:35am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 4 Jul, 2022 @ 1:08pm

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 26 Jun, 2022 @ 5:12am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 4 Jul, 2022 @ 10:55am

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 4 Jul, 2022 @ 1:34pm



Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.

Centripetal Attraction

Kill 20 Enemies with the Hivehand.

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.

Futile Resistance

Kill 10 Enemies with Snarks.

Kinetic Repulsion

Kill a Marine with their own Grenade.

Mega Hertz

Kill 5 Enemies with one Grenade.

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.

Rare Specimen

Send the Hidden Hat to Xen.

Remote Detonation

Kill a Barnacle with a Satchel.

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​​.

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.​

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.

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.​

Rather an Anticlimax

Decline G-Man’s offer of employment.

Well-Done

Cook a Grenade for too long.
+7

7 hidden achievements remaining

Details for each achievement will be revealed once unlocked