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26 of 50 (52%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 29 Sep, 2023 @ 10:02pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 29 Sep, 2023 @ 10:07pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 29 Sep, 2023 @ 9:50pm

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 29 Sep, 2023 @ 9:43pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 29 Apr, 2023 @ 1:01pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 29 Sep, 2023 @ 9:52pm

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 29 Sep, 2023 @ 9:38pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 29 Sep, 2023 @ 9:33pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 29 Sep, 2023 @ 9:51pm

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 29 Sep, 2023 @ 9:43pm

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 16 Oct, 2023 @ 10:14am

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 30 Sep, 2023 @ 4:31pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 29 Sep, 2023 @ 8:47pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 29 Sep, 2023 @ 10:23pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 29 Sep, 2023 @ 9:59pm

Quantum Capacitance

Overcharge it anyway.
Unlocked 16 Oct, 2023 @ 10:14am

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 28 Dec, 2023 @ 8:31am

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked 29 Sep, 2023 @ 10:15pm

Universal Gravitation

Get killed by your own Snarks.
Unlocked 29 Sep, 2023 @ 9:46pm

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Unlocked 16 Oct, 2023 @ 10:10am

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 30 Sep, 2023 @ 4:30pm

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked 29 Sep, 2023 @ 10:18pm

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Unlocked 27 Nov, 2023 @ 8:26am

Gonad Glider

Get whacked into oblivion in the ledge fight.
Unlocked 28 Dec, 2023 @ 8:14am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 15 Aug, 2024 @ 8:38am

Well-Done

Cook a Grenade for too long.
Unlocked 30 Sep, 2023 @ 3:23pm



Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

Ethically Questionable

Conduct all of the questionable research experiments.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Kinetic Repulsion

Kill a Marine with their own Grenade.

Rare Specimen

Send the Hidden Hat to Xen.

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.

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.​

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.​

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