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Brownian Motion

Pass the toilet paper to the Scientist in need.
Desbloqueada a 18 dez. 2015 às 12:28

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Desbloqueada a 14 mar. 2020 às 13:36

Convection Refinement

Ruin the microwave casserole.
Desbloqueada a 18 dez. 2015 às 12:27

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Desbloqueada a 14 mar. 2020 às 8:10

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Desbloqueada a 29 fev. 2016 às 9:12

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Desbloqueada a 15 mar. 2020 às 3:13

Inflammatory Actions

Kill a Headcrab using fire.
Desbloqueada a 15 mar. 2020 às 7:45

Kinetic Repulsion

Kill a Marine with their own Grenade.
Desbloqueada a 14 mar. 2020 às 9:39

Mega Hertz

Kill 5 Enemies with one Grenade.
Desbloqueada a 15 mar. 2020 às 7:13

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Desbloqueada a 15 mar. 2020 às 7:04

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Desbloqueada a 15 mar. 2020 às 9:22

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Desbloqueada a 18 dez. 2015 às 12:54

Quantum Capacitance

Overcharge it anyway.
Desbloqueada a 14 mar. 2020 às 8:51

Remote Detonation

Kill a Barnacle with a Satchel.
Desbloqueada a 16 abr. 2016 às 5:13

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Desbloqueada a 18 dez. 2015 às 12:41

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Desbloqueada a 15 mar. 2020 às 10:09

Contest Propellant

Find the snack supply canister.
Desbloqueada a 15 mar. 2020 às 8:30

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Desbloqueada a 15 mar. 2020 às 8:29

Limitless Potential

Accept G-Man’s offer of employment.
Desbloqueada a 15 mar. 2020 às 10:02

Rather an Anticlimax

Decline G-Man’s offer of employment.
Desbloqueada a 15 mar. 2020 às 10:01



Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.

Centripetal Attraction

Kill 20 Enemies with the Hivehand.

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

Ethically Questionable

Conduct all of the questionable research experiments.

Futile Resistance

Kill 10 Enemies with Snarks.

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.

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.

Universal Gravitation

Get killed by your own Snarks.

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.

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.

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.​

Well-Done

Cook a Grenade for too long.
+6

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