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Brownian Motion

Pass the toilet paper to the Scientist in need.
Upplåst 30 jun, 2023 @ 14:42

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Upplåst 16 jul, 2023 @ 9:07

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Upplåst 9 jul, 2023 @ 9:28

Convection Refinement

Ruin the microwave casserole.
Upplåst 30 jun, 2023 @ 14:41

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Upplåst 9 jul, 2023 @ 0:24

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Upplåst 10 jul, 2023 @ 12:31

Inflammatory Actions

Kill a Headcrab using fire.
Upplåst 30 jun, 2023 @ 15:09

Kinetic Repulsion

Kill a Marine with their own Grenade.
Upplåst 9 jul, 2023 @ 1:47

Mega Hertz

Kill 5 Enemies with one Grenade.
Upplåst 11 jul, 2023 @ 4:54

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Upplåst 10 jul, 2023 @ 17:36

Permeable Infrastructure

Use the alternate path in Office Complex.
Upplåst 30 jun, 2023 @ 16:02

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Upplåst 10 jul, 2023 @ 17:19

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Upplåst 10 jul, 2023 @ 5:40

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Upplåst 16 jul, 2023 @ 9:06

Quantum Capacitance

Overcharge it anyway.
Upplåst 10 jul, 2023 @ 17:24

Remote Detonation

Kill a Barnacle with a Satchel.
Upplåst 9 jul, 2023 @ 0:58

xen when

Wait too long to jump into the Lambda Teleporter.
Upplåst 10 jul, 2023 @ 17:19

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Upplåst 30 jun, 2023 @ 14:55

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Upplåst 10 jul, 2023 @ 17:26

Following the Rules

Use the welcome mat.
Upplåst 10 jul, 2023 @ 17:40

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Upplåst 13 jul, 2023 @ 4:07

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Upplåst 13 jul, 2023 @ 4:18

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Upplåst 16 jul, 2023 @ 8:50

Late for Work

Defeat Nihilanth in under 4 minutes.​
Upplåst 16 jul, 2023 @ 8:51

Limitless Potential

Accept G-Man’s offer of employment.
Upplåst 16 jul, 2023 @ 9:03

Rather an Anticlimax

Decline G-Man’s offer of employment.
Upplåst 16 jul, 2023 @ 8:55

Pepperoni Precipitation

View the *other* secret ending.
Upplåst 16 jul, 2023 @ 8:53

Well-Done

Cook a Grenade for too long.
Upplåst 9 jul, 2023 @ 0:59



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.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Rare Specimen

Send the Hidden Hat to Xen.

Resonance Procrastinator

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

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.

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.
+4

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