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19 of 50 (38%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 2 Nov, 2019 @ 6:33am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Unlocked 2 Nov, 2019 @ 6:53am

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Unlocked 20 Mar, 2021 @ 1:05am

Convection Refinement

Ruin the microwave casserole.
Unlocked 2 Nov, 2019 @ 6:30am

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 20 Mar, 2021 @ 6:52am

Futile Resistance

Kill 10 Enemies with Snarks.
Unlocked 20 Mar, 2021 @ 6:10am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 8 Nov, 2019 @ 10:48pm

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 20 Mar, 2021 @ 6:44am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Unlocked 20 Mar, 2021 @ 8:32am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 20 Mar, 2021 @ 11:41am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 4 Nov, 2019 @ 11:19am

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked 2 Nov, 2019 @ 6:27am

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked 20 Mar, 2021 @ 6:33am

Universal Gravitation

Get killed by your own Snarks.
Unlocked 20 May, 2020 @ 1:31am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 21 Mar, 2021 @ 4:03am

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Unlocked 20 Mar, 2021 @ 6:15am

Following the Rules

Use the welcome mat.
Unlocked 20 Mar, 2021 @ 8:17am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 20 Mar, 2021 @ 12:04pm

Well-Done

Cook a Grenade for too long.
Unlocked 20 Mar, 2021 @ 1:08am



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.

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.

Permeable Infrastructure

Use the alternate path in Office Complex.

Quantum Capacitance

Overcharge it anyway.

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.

Prolific Popper

Kill all Protozoans 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.

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.

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.
+6

6 hidden achievements remaining

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