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43 of 50 (86%) achievements earned:
Personal Achievements

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked Feb 7, 2020 @ 12:58pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked Feb 7, 2020 @ 1:21pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked Nov 13, 2020 @ 6:31am

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked Nov 13, 2020 @ 3:43pm

Convection Refinement

Ruin the microwave casserole.
Unlocked Feb 7, 2020 @ 12:55pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked Nov 13, 2020 @ 9:27am

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked Nov 13, 2020 @ 6:58am

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked Nov 13, 2020 @ 10:37am

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked Nov 13, 2020 @ 10:20am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked Nov 13, 2020 @ 8:32am

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked Nov 13, 2020 @ 5:00pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked Nov 14, 2020 @ 7:45am

Kinetic Repulsion

Kill a Marine with their own Grenade.
Unlocked Nov 13, 2020 @ 7:04am

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked Nov 13, 2020 @ 6:28am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked Nov 13, 2020 @ 2:48pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked Nov 13, 2020 @ 6:23am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked Nov 13, 2020 @ 4:48pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked Nov 13, 2020 @ 5:20am

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked Feb 7, 2020 @ 12:49pm

Quantum Capacitance

Overcharge it anyway.
Unlocked Nov 13, 2020 @ 10:33am

Rare Specimen

Send the Hidden Hat to Xen.
Unlocked Nov 13, 2020 @ 5:46pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked Nov 13, 2020 @ 7:39am

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked Nov 13, 2020 @ 5:31am

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked Nov 13, 2020 @ 7:10am

Universal Gravitation

Get killed by your own Snarks.
Unlocked Nov 13, 2020 @ 10:18am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked Mar 27, 2022 @ 5:35am

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Unlocked Nov 13, 2020 @ 8:58am

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Unlocked Nov 13, 2020 @ 4:11pm

xen when

Wait too long to jump into the Lambda Teleporter.
Unlocked Nov 13, 2020 @ 5:53pm

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked Nov 13, 2020 @ 6:51am

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Unlocked Nov 13, 2020 @ 5:29am

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Unlocked Nov 14, 2020 @ 7:38am

Following the Rules

Use the welcome mat.
Unlocked Nov 14, 2020 @ 7:42am

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Unlocked Nov 14, 2020 @ 11:15am

Gonad Glider

Get whacked into oblivion in the ledge fight.
Unlocked Nov 14, 2020 @ 10:20am

The Plan

Use Cyanogen to kill Gonarch.
Unlocked Nov 14, 2020 @ 11:07am

Unquestionably Ethical

Don't use the Cyanogen and let the Gonarch live.
Unlocked Nov 14, 2020 @ 11:08am

Contest Propellant

Find the snack supply canister.
Unlocked Nov 14, 2020 @ 12:29pm

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked Nov 14, 2020 @ 12:24pm

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Unlocked Mar 27, 2022 @ 5:58am

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked Mar 27, 2022 @ 6:04am

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked Mar 27, 2022 @ 6:03am


Cook a Grenade for too long.
Unlocked Nov 13, 2020 @ 5:45am

Prolific Popper

Kill all Protozoans in the Borderworld.

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.

Late for Work

Defeat Nihilanth in under 4 minutes.​

2 hidden achievements remaining

Details for each achievement will be revealed once unlocked