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Đạt được 20 trên 50 (40%) thành tựu:
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Brownian Motion

Pass the toilet paper to the Scientist in need.
Mở khóa vào 7 Thg12, 2019 @ 5:04am

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Mở khóa vào 8 Thg12, 2019 @ 4:04pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Mở khóa vào 9 Thg12, 2019 @ 7:57am

Convection Refinement

Ruin the microwave casserole.
Mở khóa vào 7 Thg12, 2019 @ 5:02am

Ethically Questionable

Conduct all of the questionable research experiments.
Mở khóa vào 8 Thg12, 2019 @ 2:23pm

Futile Resistance

Kill 10 Enemies with Snarks.
Mở khóa vào 8 Thg03 @ 3:18pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Mở khóa vào 7 Thg12, 2019 @ 12:07pm

Inflammatory Actions

Kill a Headcrab using fire.
Mở khóa vào 9 Thg12, 2019 @ 9:28am

Mega Hertz

Kill 5 Enemies with one Grenade.
Mở khóa vào 17 Thg08, 2023 @ 6:40am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Mở khóa vào 25 Thg04 @ 2:45pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Mở khóa vào 7 Thg12, 2019 @ 7:07am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Mở khóa vào 9 Thg12, 2019 @ 11:58am

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Mở khóa vào 7 Thg12, 2019 @ 11:50am

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Mở khóa vào 17 Thg08, 2023 @ 4:54am

Quantum Capacitance

Overcharge it anyway.
Mở khóa vào 8 Thg12, 2019 @ 2:43pm

Universal Gravitation

Get killed by your own Snarks.
Mở khóa vào 8 Thg12, 2019 @ 3:51pm

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Mở khóa vào 4 Thg05 @ 12:39pm

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Mở khóa vào 29 Thg04 @ 2:33pm

Limitless Potential

Accept G-Man’s offer of employment.
Mở khóa vào 4 Thg05 @ 1:03pm

Rather an Anticlimax

Decline G-Man’s offer of employment.
Mở khóa vào 4 Thg05 @ 1:08pm



Centripetal Attraction

Kill 20 Enemies with the Hivehand.

Dead Reckoning

Kill an Assassin with the .357 Magnum.

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

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.

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.

Prolific Popper

Kill all Protozoans 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.

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.

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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