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

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 2 Jan, 2018 @ 12:58pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 23 Oct, 2020 @ 6:01pm

Convection Refinement

Ruin the microwave casserole.
Unlocked 2 Jan, 2018 @ 12:56pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 13 Jan, 2020 @ 3:19pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 3 Jan, 2018 @ 3:30pm

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 12 Nov, 2020 @ 8:52am

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked 12 Jan, 2020 @ 1:59pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 12 Jan, 2020 @ 12:09pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 2 Jan, 2018 @ 12:51pm

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Unlocked 12 Nov, 2020 @ 9:13am

Contest Propellant

Find the snack supply canister.
Unlocked 13 Nov, 2020 @ 1:56pm

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Unlocked 13 Nov, 2020 @ 2:01pm

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Unlocked 13 Nov, 2020 @ 3:14pm

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 13 Nov, 2020 @ 3:20pm

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked 13 Nov, 2020 @ 3:19pm

Well-Done

Cook a Grenade for too long.
Unlocked 19 Nov @ 9:29am



Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.

Centripetal Attraction

Kill 20 Enemies with the Hivehand.

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.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Inflammatory Actions

Kill a Headcrab using fire.

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.

Quantum Capacitance

Overcharge it anyway.

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.

Universal Gravitation

Get killed by your own Snarks.

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​​.

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.

Our Brains And Your Brawn

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

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.

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.

Late for Work

Defeat Nihilanth in under 4 minutes.​
+6

6 hidden achievements remaining

Details for each achievement will be revealed once unlocked