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Brownian Motion

Pass the toilet paper to the Scientist in need.
Здобуто 18 лют. 2018 о 12:35

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Здобуто 19 лют. 2018 о 12:47

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Здобуто 19 лют. 2018 о 1:29

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Здобуто 22 лют. 2018 о 8:29

Convection Refinement

Ruin the microwave casserole.
Здобуто 18 лют. 2018 о 12:35

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Здобуто 22 лют. 2018 о 7:54

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Здобуто 7 січ. 2020 о 9:59

Ethically Questionable

Conduct all of the questionable research experiments.
Здобуто 22 лют. 2018 о 8:26

Futile Resistance

Kill 10 Enemies with Snarks.
Здобуто 22 лют. 2018 о 12:35

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Здобуто 18 лют. 2018 о 23:52

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Здобуто 21 лют. 2018 о 8:58

Inflammatory Actions

Kill a Headcrab using fire.
Здобуто 22 лют. 2018 о 8:21

Kinetic Repulsion

Kill a Marine with their own Grenade.
Здобуто 7 січ. 2020 о 9:55

Mega Hertz

Kill 5 Enemies with one Grenade.
Здобуто 22 лют. 2018 о 12:42

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Здобуто 23 лют. 2018 о 0:43

Permeable Infrastructure

Use the alternate path in Office Complex.
Здобуто 22 лют. 2018 о 12:06

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Здобуто 22 лют. 2018 о 8:02

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Здобуто 18 лют. 2018 о 13:05

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Здобуто 22 лют. 2018 о 11:49

Quantum Capacitance

Overcharge it anyway.
Здобуто 22 лют. 2018 о 7:55

Rare Specimen

Send the Hidden Hat to Xen.
Здобуто 12 черв. 2018 о 7:37

Remote Detonation

Kill a Barnacle with a Satchel.
Здобуто 22 лют. 2018 о 11:42

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Здобуто 22 лют. 2018 о 8:17

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Здобуто 23 лют. 2018 о 0:33

Universal Gravitation

Get killed by your own Snarks.
Здобуто 19 лют. 2018 о 13:03

Prolific Popper

Kill all Protozoans in the Borderworld.
Здобуто 2 верес. 2020 о 4:02

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Здобуто 25 серп. 2020 о 9:41

The Rarest Specimen

Carry the Hidden Hat to Endgame.
Здобуто 30 серп. 2020 о 4:53

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Здобуто 21 серп. 2020 о 6:31

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Здобуто 21 серп. 2020 о 4:52

xen when

Wait too long to jump into the Lambda Teleporter.
Здобуто 25 серп. 2020 о 11:50

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Здобуто 22 серп. 2020 о 7:25

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Здобуто 21 серп. 2020 о 4:59

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Здобуто 21 серп. 2020 о 5:59

Following the Rules

Use the welcome mat.
Здобуто 21 серп. 2020 о 7:17

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Здобуто 21 серп. 2020 о 12:01

Gonad Glider

Get whacked into oblivion in the ledge fight.
Здобуто 22 серп. 2020 о 6:57

Post-Mortem Interval

Find each member of the missing research teams.
Здобуто 21 серп. 2020 о 12:49

The Plan

Use Cyanogen to kill Gonarch.
Здобуто 25 серп. 2020 о 14:38

Unquestionably Ethical

Don't use the Cyanogen and let the Gonarch live.
Здобуто 25 серп. 2020 о 14:40

Contest Propellant

Find the snack supply canister.
Здобуто 25 серп. 2020 о 11:40

Laser Immunization

Complete Interloper without taking any laser damage.
Здобуто 25 серп. 2020 о 9:41

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Здобуто 25 серп. 2020 о 11:26

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Здобуто 19 трав. 2020 о 3:16

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Здобуто 25 серп. 2020 о 8:20

Late for Work

Defeat Nihilanth in under 4 minutes.​
Здобуто 25 серп. 2020 о 11:32

Limitless Potential

Accept G-Man’s offer of employment.
Здобуто 17 серп. 2020 о 5:16

Rather an Anticlimax

Decline G-Man’s offer of employment.
Здобуто 17 серп. 2020 о 5:17

Pepperoni Precipitation

View the *other* secret ending.
Здобуто 26 серп. 2020 о 15:44

Well-Done

Cook a Grenade for too long.
Здобуто 24 берез. 2020 о 5:22