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Brownian Motion

Pass the toilet paper to the Scientist in need.
Здобуто 14 трав. 2018 о 16:00

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Здобуто 14 трав. 2018 о 17:26

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Здобуто 26 трав. 2021 о 8:22

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Здобуто 28 трав. 2021 о 10:48

Convection Refinement

Ruin the microwave casserole.
Здобуто 14 трав. 2018 о 15:58

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Здобуто 27 трав. 2021 о 7:42

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Здобуто 26 трав. 2021 о 9:07

Ethically Questionable

Conduct all of the questionable research experiments.
Здобуто 28 трав. 2021 о 7:52

Futile Resistance

Kill 10 Enemies with Snarks.
Здобуто 30 трав. 2021 о 17:20

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Здобуто 19 трав. 2018 о 9:54

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Здобуто 29 трав. 2021 о 15:48

Inflammatory Actions

Kill a Headcrab using fire.
Здобуто 14 трав. 2018 о 16:42

Kinetic Repulsion

Kill a Marine with their own Grenade.
Здобуто 27 трав. 2021 о 6:02

Mega Hertz

Kill 5 Enemies with one Grenade.
Здобуто 30 трав. 2021 о 14:03

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Здобуто 29 трав. 2021 о 13:21

Permeable Infrastructure

Use the alternate path in Office Complex.
Здобуто 26 трав. 2021 о 8:08

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Здобуто 29 трав. 2021 о 15:34

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Здобуто 25 трав. 2021 о 14:39

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Здобуто 14 трав. 2018 о 15:54

Quantum Capacitance

Overcharge it anyway.
Здобуто 28 трав. 2021 о 7:39

Rare Specimen

Send the Hidden Hat to Xen.
Здобуто 31 трав. 2021 о 5:53

Remote Detonation

Kill a Barnacle with a Satchel.
Здобуто 27 трав. 2021 о 6:12

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Здобуто 25 трав. 2021 о 14:13

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Здобуто 26 трав. 2021 о 9:56

Universal Gravitation

Get killed by your own Snarks.
Здобуто 28 трав. 2021 о 7:29

Prolific Popper

Kill all Protozoans in the Borderworld.
Здобуто 31 трав. 2021 о 22:50

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Здобуто 31 трав. 2021 о 17:10

The Rarest Specimen

Carry the Hidden Hat to Endgame.
Здобуто 2 черв. 2021 о 13:39

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Здобуто 27 трав. 2021 о 5:42

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Здобуто 28 трав. 2021 о 12:23

xen when

Wait too long to jump into the Lambda Teleporter.
Здобуто 31 трав. 2021 о 5:53

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Здобуто 30 трав. 2021 о 5:13

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Здобуто 25 трав. 2021 о 14:10

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Здобуто 31 трав. 2021 о 19:54

Following the Rules

Use the welcome mat.
Здобуто 31 трав. 2021 о 7:11

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Здобуто 31 трав. 2021 о 14:50

Gonad Glider

Get whacked into oblivion in the ledge fight.
Здобуто 31 трав. 2021 о 13:51

Post-Mortem Interval

Find each member of the missing research teams.
Здобуто 31 трав. 2021 о 22:56

The Plan

Use Cyanogen to kill Gonarch.
Здобуто 31 трав. 2021 о 22:52

Unquestionably Ethical

Don't use the Cyanogen and let the Gonarch live.
Здобуто 31 трав. 2021 о 22:53

Contest Propellant

Find the snack supply canister.
Здобуто 31 трав. 2021 о 20:07

Laser Immunization

Complete Interloper without taking any laser damage.
Здобуто 31 трав. 2021 о 17:10

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Здобуто 31 трав. 2021 о 15:22

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Здобуто 31 трав. 2021 о 15:01

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Здобуто 31 трав. 2021 о 19:33

Late for Work

Defeat Nihilanth in under 4 minutes.​
Здобуто 31 трав. 2021 о 19:34

Limitless Potential

Accept G-Man’s offer of employment.
Здобуто 31 трав. 2021 о 18:00

Rather an Anticlimax

Decline G-Man’s offer of employment.
Здобуто 31 трав. 2021 о 18:01

Pepperoni Precipitation

View the *other* secret ending.
Здобуто 2 черв. 2021 о 13:13

Well-Done

Cook a Grenade for too long.
Здобуто 27 трав. 2021 о 5:42