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24 z 50 (48%) osiągnięć zdobytych:
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Brownian Motion

Pass the toilet paper to the Scientist in need.
Odblokowano: 27 kwietnia 2017 o 13:28

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Odblokowano: 7 grudnia 2024 o 20:23

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Odblokowano: 8 grudnia 2024 o 7:47

Convection Refinement

Ruin the microwave casserole.
Odblokowano: 27 kwietnia 2017 o 13:25

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Odblokowano: 9 grudnia 2024 o 16:47

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Odblokowano: 7 grudnia 2024 o 21:59

Ethically Questionable

Conduct all of the questionable research experiments.
Odblokowano: 13 grudnia 2024 o 16:54

Futile Resistance

Kill 10 Enemies with Snarks.
Odblokowano: 13 grudnia 2024 o 16:46

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Odblokowano: 8 grudnia 2024 o 13:29

Inflammatory Actions

Kill a Headcrab using fire.
Odblokowano: 6 grudnia 2024 o 18:21

Kinetic Repulsion

Kill a Marine with their own Grenade.
Odblokowano: 8 grudnia 2024 o 7:29

Mega Hertz

Kill 5 Enemies with one Grenade.
Odblokowano: 6 grudnia 2024 o 18:45

Permeable Infrastructure

Use the alternate path in Office Complex.
Odblokowano: 7 grudnia 2024 o 20:55

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Odblokowano: 6 grudnia 2024 o 18:00

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Odblokowano: 6 grudnia 2024 o 17:14

Quantum Capacitance

Overcharge it anyway.
Odblokowano: 13 grudnia 2024 o 16:49

Remote Detonation

Kill a Barnacle with a Satchel.
Odblokowano: 8 grudnia 2024 o 12:27

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Odblokowano: 6 grudnia 2024 o 17:53

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Odblokowano: 8 grudnia 2024 o 7:41

Universal Gravitation

Get killed by your own Snarks.
Odblokowano: 12 grudnia 2024 o 18:27

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Odblokowano: 8 grudnia 2024 o 13:18

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Odblokowano: 7 grudnia 2024 o 21:37

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Odblokowano: 6 grudnia 2024 o 17:50

Well-Done

Cook a Grenade for too long.
Odblokowano: 7 grudnia 2024 o 20:25



Centripetal Attraction

Kill 20 Enemies with the Hivehand.

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.

Premature Expulsion

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

Rare Specimen

Send the Hidden Hat to Xen.

Prolific Popper

Kill all Protozoans in the Borderworld.

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.

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.
+7

Pozostałe ukryte osiągnięcia: 7

Szczegóły dla każdego osiągnięcia zostaną podane po jego odblokowaniu