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50 dari 50 (100%) pencapaian didapatkan:
Pencapaian Pribadi
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Didapatkan pada 31 Jan 2017 @ 10:15am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Didapatkan pada 31 Jan 2017 @ 10:38am

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Didapatkan pada 26 Feb 2017 @ 2:59am

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Didapatkan pada 26 Feb 2017 @ 7:51am

Convection Refinement

Ruin the microwave casserole.
Didapatkan pada 31 Jan 2017 @ 10:12am

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Didapatkan pada 26 Feb 2017 @ 10:21am

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Didapatkan pada 26 Feb 2017 @ 11:32pm

Ethically Questionable

Conduct all of the questionable research experiments.
Didapatkan pada 26 Feb 2017 @ 11:31am

Futile Resistance

Kill 10 Enemies with Snarks.
Didapatkan pada 26 Feb 2017 @ 9:38am

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Didapatkan pada 26 Feb 2017 @ 2:31am

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Didapatkan pada 27 Feb 2017 @ 1:01am

Inflammatory Actions

Kill a Headcrab using fire.
Didapatkan pada 31 Jan 2017 @ 10:47am

Kinetic Repulsion

Kill a Marine with their own Grenade.
Didapatkan pada 26 Feb 2017 @ 7:24am

Mega Hertz

Kill 5 Enemies with one Grenade.
Didapatkan pada 26 Feb 2017 @ 2:50am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Didapatkan pada 26 Feb 2017 @ 10:10am

Permeable Infrastructure

Use the alternate path in Office Complex.
Didapatkan pada 27 Feb 2017 @ 2:29am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Didapatkan pada 26 Feb 2017 @ 12:42pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Didapatkan pada 31 Jan 2017 @ 10:58am

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Didapatkan pada 31 Jan 2017 @ 10:11am

Quantum Capacitance

Overcharge it anyway.
Didapatkan pada 26 Feb 2017 @ 10:09am

Rare Specimen

Send the Hidden Hat to Xen.
Didapatkan pada 27 Feb 2017 @ 2:15am

Remote Detonation

Kill a Barnacle with a Satchel.
Didapatkan pada 26 Feb 2017 @ 2:57am

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Didapatkan pada 31 Jan 2017 @ 10:26am

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Didapatkan pada 26 Feb 2017 @ 7:52am

Universal Gravitation

Get killed by your own Snarks.
Didapatkan pada 26 Feb 2017 @ 7:34am

Prolific Popper

Kill all Protozoans in the Borderworld.
Didapatkan pada 23 Nov @ 8:31am

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Didapatkan pada 22 Jun 2020 @ 10:55am

The Rarest Specimen

Carry the Hidden Hat to Endgame.
Didapatkan pada 23 Nov @ 9:10am

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Didapatkan pada 12 Agu 2022 @ 12:32pm

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Didapatkan pada 21 Jun 2020 @ 5:12pm

xen when

Wait too long to jump into the Lambda Teleporter.
Didapatkan pada 13 Agu 2022 @ 5:50am

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Didapatkan pada 12 Agu 2022 @ 7:52am

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Didapatkan pada 12 Agu 2022 @ 4:36am

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Didapatkan pada 13 Agu 2022 @ 6:20am

Following the Rules

Use the welcome mat.
Didapatkan pada 13 Agu 2022 @ 6:34am

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Didapatkan pada 22 Jun 2020 @ 7:23am

Gonad Glider

Get whacked into oblivion in the ledge fight.
Didapatkan pada 22 Nov @ 3:52am

Post-Mortem Interval

Find each member of the missing research teams.
Didapatkan pada 22 Nov @ 5:34am

The Plan

Use Cyanogen to kill Gonarch.
Didapatkan pada 22 Nov @ 4:46am

Unquestionably Ethical

Don't use the Cyanogen and let the Gonarch live.
Didapatkan pada 22 Nov @ 4:46am

Contest Propellant

Find the snack supply canister.
Didapatkan pada 23 Nov @ 6:08am

Laser Immunization

Complete Interloper without taking any laser damage.
Didapatkan pada 23 Nov @ 8:59am

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Didapatkan pada 23 Nov @ 8:47am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Didapatkan pada 22 Jun 2020 @ 7:40am

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Didapatkan pada 22 Jun 2020 @ 11:29am

Late for Work

Defeat Nihilanth in under 4 minutes.​
Didapatkan pada 22 Jun 2020 @ 1:47pm

Limitless Potential

Accept G-Man’s offer of employment.
Didapatkan pada 22 Jun 2020 @ 11:36am

Rather an Anticlimax

Decline G-Man’s offer of employment.
Didapatkan pada 22 Jun 2020 @ 1:51pm

Pepperoni Precipitation

View the *other* secret ending.
Didapatkan pada 23 Nov @ 9:06am

Well-Done

Cook a Grenade for too long.
Didapatkan pada 12 Agu 2022 @ 5:05am