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Brownian Motion

Pass the toilet paper to the Scientist in need.
Здобуто 13 січ. 2017 о 22:42

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Здобуто 20 січ. 2017 о 1:37

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Здобуто 18 січ. 2017 о 7:04

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Здобуто 19 січ. 2017 о 0:28

Convection Refinement

Ruin the microwave casserole.
Здобуто 13 січ. 2017 о 22:40

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Здобуто 17 січ. 2017 о 23:09

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Здобуто 20 січ. 2017 о 7:01

Ethically Questionable

Conduct all of the questionable research experiments.
Здобуто 21 січ. 2017 о 0:44

Futile Resistance

Kill 10 Enemies with Snarks.
Здобуто 19 січ. 2017 о 4:20

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Здобуто 16 січ. 2017 о 2:35

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Здобуто 19 січ. 2017 о 7:41

Inflammatory Actions

Kill a Headcrab using fire.
Здобуто 20 січ. 2017 о 0:02

Kinetic Repulsion

Kill a Marine with their own Grenade.
Здобуто 20 січ. 2017 о 7:15

Mega Hertz

Kill 5 Enemies with one Grenade.
Здобуто 20 січ. 2017 о 0:08

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Здобуто 21 січ. 2017 о 0:58

Permeable Infrastructure

Use the alternate path in Office Complex.
Здобуто 20 січ. 2017 о 2:57

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Здобуто 19 січ. 2017 о 7:42

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Здобуто 15 січ. 2017 о 0:50

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Здобуто 13 січ. 2017 о 22:33

Quantum Capacitance

Overcharge it anyway.
Здобуто 18 січ. 2017 о 6:13

Rare Specimen

Send the Hidden Hat to Xen.
Здобуто 21 січ. 2017 о 4:54

Remote Detonation

Kill a Barnacle with a Satchel.
Здобуто 19 січ. 2017 о 5:48

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Здобуто 20 січ. 2017 о 1:53

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Здобуто 20 січ. 2017 о 2:17

Universal Gravitation

Get killed by your own Snarks.
Здобуто 18 січ. 2017 о 6:03



Prolific Popper

Kill all Protozoans in the Borderworld.

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.

One Step Ahead

Kill 10 Enemies with Tripmines​​.

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.

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.

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.

Well-Done

Cook a Grenade for too long.
+7

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