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Đạt được 17 trên 50 (34%) thành tựu:
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Brownian Motion

Pass the toilet paper to the Scientist in need.
Mở khóa vào 12 Thg01, 2021 @ 1:33pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Mở khóa vào 30 Thg05, 2021 @ 1:58pm

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Mở khóa vào 4 Thg08, 2021 @ 4:34am

Convection Refinement

Ruin the microwave casserole.
Mở khóa vào 12 Thg01, 2021 @ 1:34pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Mở khóa vào 24 Thg07, 2021 @ 4:43pm

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Mở khóa vào 24 Thg07, 2021 @ 4:40pm

Inflammatory Actions

Kill a Headcrab using fire.
Mở khóa vào 4 Thg08, 2021 @ 4:35am

Mega Hertz

Kill 5 Enemies with one Grenade.
Mở khóa vào 3 Thg08, 2021 @ 8:57am

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Mở khóa vào 3 Thg08, 2021 @ 8:44am

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Mở khóa vào 3 Thg08, 2021 @ 2:47pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Mở khóa vào 30 Thg05, 2021 @ 2:07pm

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Mở khóa vào 24 Thg07, 2021 @ 4:17pm

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Mở khóa vào 22 Thg07, 2021 @ 9:12am

Gonad Glider

Get whacked into oblivion in the ledge fight.
Mở khóa vào 3 Thg08, 2021 @ 2:47pm

Contest Propellant

Find the snack supply canister.
Mở khóa vào 17 Thg08, 2021 @ 6:46am

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Mở khóa vào 16 Thg08, 2021 @ 7:57am

Limitless Potential

Accept G-Man’s offer of employment.
Mở khóa vào 15 Thg09, 2021 @ 8:57am



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.

Kinetic Repulsion

Kill a Marine with their own Grenade.

Permeable Infrastructure

Use the alternate path in Office Complex.

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.

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.

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.​

Rather an Anticlimax

Decline G-Man’s offer of employment.

Well-Done

Cook a Grenade for too long.
+6

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