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28 of 50 (56%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 7 Mar, 2020 @ 5:28am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 8 Mar, 2020 @ 7:30am

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 7 Mar, 2020 @ 9:42pm

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Unlocked 8 Mar, 2020 @ 7:09am

Convection Refinement

Ruin the microwave casserole.
Unlocked 7 Mar, 2020 @ 5:23am

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 7 Mar, 2020 @ 10:50pm

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked 8 Mar, 2020 @ 5:06am

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 8 Mar, 2020 @ 7:30am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 7 Mar, 2020 @ 8:52pm

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked 8 Mar, 2020 @ 9:02am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked 7 Mar, 2020 @ 5:57am

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 8 Mar, 2020 @ 12:13am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 8 Mar, 2020 @ 8:06pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 8 Mar, 2020 @ 10:15pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 8 Mar, 2020 @ 5:34am

Quantum Capacitance

Overcharge it anyway.
Unlocked 8 Mar, 2020 @ 7:01am

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 8 Mar, 2020 @ 9:05am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 9 Mar, 2020 @ 2:26am

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Unlocked 7 Mar, 2020 @ 7:15am

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Unlocked 9 Mar, 2020 @ 3:19am

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Unlocked 8 Mar, 2020 @ 11:22pm

The Plan

Use Cyanogen to kill Gonarch.
Unlocked 9 Mar, 2020 @ 12:06am

Unquestionably Ethical

Don't use the Cyanogen and let the Gonarch live.
Unlocked 9 Mar, 2020 @ 12:07am

Contest Propellant

Find the snack supply canister.
Unlocked 9 Mar, 2020 @ 12:35am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 9 Mar, 2020 @ 12:21am

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 9 Mar, 2020 @ 2:58am

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked 9 Mar, 2020 @ 3:11am

Well-Done

Cook a Grenade for too long.
Unlocked 8 Mar, 2020 @ 12:11am



Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

Kinetic Repulsion

Kill a Marine with their own Grenade.

Permeable Infrastructure

Use the alternate path in Office Complex.

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.

Rare Specimen

Send the Hidden Hat to Xen.

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.

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.

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.

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.​
+4

4 hidden achievements remaining

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