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Đạt được 12 trên 50 (24%) thành tựu:
Thành tựu cá nhân
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Mở khóa vào 24 Thg11 @ 5:18am

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Mở khóa vào 29 Thg11 @ 8:40am

Convection Refinement

Ruin the microwave casserole.
Mở khóa vào 24 Thg11 @ 5:16am

Mega Hertz

Kill 5 Enemies with one Grenade.
Mở khóa vào 1 Thg12 @ 12:58am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Mở khóa vào 4 Thg12 @ 7:53am

Quantum Capacitance

Overcharge it anyway.
Mở khóa vào 28 Thg11 @ 8:36am

Remote Detonation

Kill a Barnacle with a Satchel.
Mở khóa vào 9 Thg12 @ 7:50am

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Mở khóa vào 29 Thg11 @ 8:51am

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Mở khóa vào 24 Thg11 @ 5:34am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Mở khóa vào 9 Thg12 @ 8:04am

Limitless Potential

Accept G-Man’s offer of employment.
Mở khóa vào 2 Thg12 @ 6:34am

Rather an Anticlimax

Decline G-Man’s offer of employment.
Mở khóa vào 2 Thg12 @ 6:33am



Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.

Dead Reckoning

Kill an Assassin with the .357 Magnum.

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.

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.

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.

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.

Permeable Infrastructure

Use the alternate path in Office Complex.

Premature Expulsion

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

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.

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​​.

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.​

Well-Done

Cook a Grenade for too long.
+7

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