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17 of 50 (34%) achievements earned:
Personal Achievements
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Unlocked 17 Nov @ 4:57am

Convection Refinement

Ruin the microwave casserole.
Unlocked 17 Nov @ 4:55am

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked 18 Nov @ 10:19am

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked 18 Nov @ 5:40am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Unlocked 18 Nov @ 7:20am

Mega Hertz

Kill 5 Enemies with one Grenade.
Unlocked 20 Nov @ 12:49pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked 20 Nov @ 11:23pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked 18 Nov @ 7:03am

Quantum Capacitance

Overcharge it anyway.
Unlocked 19 Nov @ 10:49pm

Universal Gravitation

Get killed by your own Snarks.
Unlocked 18 Nov @ 11:23am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Unlocked 20 Nov @ 11:04pm

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Unlocked 20 Nov @ 4:44am

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Unlocked 20 Nov @ 1:16pm

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Unlocked 20 Nov @ 1:10pm

Late for Work

Defeat Nihilanth in under 4 minutes.​
Unlocked 20 Nov @ 11:25pm

Limitless Potential

Accept G-Man’s offer of employment.
Unlocked 20 Nov @ 11:29pm

Rather an Anticlimax

Decline G-Man’s offer of employment.
Unlocked 20 Nov @ 11:28pm



Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.

Centripetal Attraction

Kill 20 Enemies with the Hivehand.

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.

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.

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.

Remote Detonation

Kill a Barnacle with a Satchel.

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.

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.

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.

Well-Done

Cook a Grenade for too long.
+7

7 hidden achievements remaining

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