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Brownian Motion

Pass the toilet paper to the Scientist in need.
Ξεκλειδώθηκε στις 22 Μαρ 2023, 21:51

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Ξεκλειδώθηκε στις 24 Μαρ 2023, 20:56

Convection Refinement

Ruin the microwave casserole.
Ξεκλειδώθηκε στις 22 Μαρ 2023, 21:45

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Ξεκλειδώθηκε στις 24 Μαρ 2023, 1:16

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Ξεκλειδώθηκε στις 23 Μαρ 2023, 21:50

Mega Hertz

Kill 5 Enemies with one Grenade.
Ξεκλειδώθηκε στις 26 Μαρ 2023, 19:58

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Ξεκλειδώθηκε στις 24 Μαρ 2023, 21:02

Permeable Infrastructure

Use the alternate path in Office Complex.
Ξεκλειδώθηκε στις 22 Μαρ 2023, 23:01

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Ξεκλειδώθηκε στις 22 Μαρ 2023, 22:02

Contest Propellant

Find the snack supply canister.
Ξεκλειδώθηκε στις 27 Μαρ 2023, 13:48

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Ξεκλειδώθηκε στις 26 Μαρ 2023, 20:05

Limitless Potential

Accept G-Man’s offer of employment.
Ξεκλειδώθηκε στις 27 Μαρ 2023, 17:22

Rather an Anticlimax

Decline G-Man’s offer of employment.
Ξεκλειδώθηκε στις 27 Μαρ 2023, 17:23

Well-Done

Cook a Grenade for too long.
Ξεκλειδώθηκε στις 23 Μαρ 2023, 21:40



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.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Inflammatory Actions

Kill a Headcrab using fire.

Kinetic Repulsion

Kill a Marine with their own Grenade.

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.

Quantum Capacitance

Overcharge it anyway.

Rare Specimen

Send the Hidden Hat to Xen.

Remote Detonation

Kill a Barnacle with a Satchel.

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.

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.​
+6

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