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Brownian Motion

Pass the toilet paper to the Scientist in need.
Upplåst 23 dec, 2020 @ 19:34

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Upplåst 31 dec, 2021 @ 23:39

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Upplåst 30 dec, 2021 @ 5:54

Convection Refinement

Ruin the microwave casserole.
Upplåst 23 dec, 2020 @ 19:36

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Upplåst 29 dec, 2020 @ 20:54

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Upplåst 30 dec, 2020 @ 18:56

Inflammatory Actions

Kill a Headcrab using fire.
Upplåst 6 feb, 2021 @ 18:13

Mega Hertz

Kill 5 Enemies with one Grenade.
Upplåst 7 aug, 2021 @ 19:34

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Upplåst 16 dec, 2021 @ 14:08

Permeable Infrastructure

Use the alternate path in Office Complex.
Upplåst 23 dec, 2020 @ 20:45

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Upplåst 17 apr, 2021 @ 15:37

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Upplåst 7 aug, 2021 @ 19:34

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Upplåst 4 sep, 2021 @ 20:11

Quantum Capacitance

Overcharge it anyway.
Upplåst 6 feb, 2021 @ 17:17

Remote Detonation

Kill a Barnacle with a Satchel.
Upplåst 31 dec, 2021 @ 23:28

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Upplåst 16 apr, 2021 @ 18:28

Universal Gravitation

Get killed by your own Snarks.
Upplåst 31 dec, 2021 @ 23:58

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Upplåst 17 apr, 2021 @ 16:06

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Upplåst 30 dec, 2021 @ 5:43

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Upplåst 20 feb, 2022 @ 16:06

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Upplåst 7 aug, 2021 @ 9:24

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Upplåst 16 apr, 2021 @ 20:10

Limitless Potential

Accept G-Man’s offer of employment.
Upplåst 17 apr, 2021 @ 16:49

Rather an Anticlimax

Decline G-Man’s offer of employment.
Upplåst 17 apr, 2021 @ 16:48

Well-Done

Cook a Grenade for too long.
Upplåst 20 feb, 2022 @ 15:37



Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.

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.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Kinetic Repulsion

Kill a Marine with their own Grenade.

Rare Specimen

Send the Hidden Hat to Xen.

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.

Prolific Popper

Kill all Protozoans in the Borderworld.

One Step Ahead

Kill 10 Enemies with Tripmines​​.

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.

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.​
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