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

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 22 Nov, 2023 @ 1:12pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 22 Nov, 2023 @ 2:15pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 10 Dec, 2023 @ 5:32pm

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 12 Dec, 2023 @ 3:48pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 22 Nov, 2023 @ 1:54pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 4 Dec, 2023 @ 3:02pm

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 22 Nov, 2023 @ 3:45pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 22 Nov, 2023 @ 5:21pm

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 26 Dec, 2023 @ 8:32am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 22 Nov, 2023 @ 2:18pm

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked 26 Dec, 2023 @ 7:59am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 10 Dec, 2023 @ 5:18pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 26 Dec, 2023 @ 8:29am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 22 Nov, 2023 @ 1:43pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 22 Nov, 2023 @ 1:53pm

Quantum Capacitance

Overcharge it anyway.
Unlocked 10 Dec, 2023 @ 4:31pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 12 Dec, 2023 @ 4:04pm

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 22 Nov, 2023 @ 2:06pm

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 19 Jan, 2024 @ 1:50pm

Universal Gravitation

Get killed by your own Snarks.
Unlocked 10 Dec, 2023 @ 4:20pm

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Unlocked 12 Dec, 2023 @ 3:36pm

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 22 Nov, 2023 @ 2:03pm

Following the Rules

Use the welcome mat.
Unlocked 19 Jan, 2024 @ 1:13pm

Well-Done

Cook a Grenade for too long.
Unlocked 11 Dec, 2023 @ 2:38pm



Ethically Questionable

Conduct all of the questionable research experiments.

Futile Resistance

Kill 10 Enemies with Snarks.

Mega Hertz

Kill 5 Enemies with one Grenade.

Permeable Infrastructure

Use the alternate path in Office Complex.

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.

One Step Ahead

Kill 10 Enemies with Tripmines​​.

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.

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.
+6

6 hidden achievements remaining

Details for each achievement will be revealed once unlocked