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50 achievement su 50 (100%) ottenuti:
Achievement personali
 

Brownian Motion

Pass the toilet paper to the Scientist in need.
Sbloccato in data 26 giu 2017, ore 0:38

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Sbloccato in data 26 giu 2017, ore 0:37

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Sbloccato in data 4 giu 2021, ore 13:51

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Sbloccato in data 5 giu 2021, ore 9:14

Convection Refinement

Ruin the microwave casserole.
Sbloccato in data 26 giu 2017, ore 0:09

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Sbloccato in data 4 giu 2021, ore 14:37

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Sbloccato in data 29 giu 2017, ore 6:13

Ethically Questionable

Conduct all of the questionable research experiments.
Sbloccato in data 5 giu 2021, ore 9:01

Futile Resistance

Kill 10 Enemies with Snarks.
Sbloccato in data 5 giu 2021, ore 9:40

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Sbloccato in data 29 giu 2017, ore 6:28

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Sbloccato in data 5 giu 2021, ore 10:02

Inflammatory Actions

Kill a Headcrab using fire.
Sbloccato in data 26 giu 2017, ore 1:05

Kinetic Repulsion

Kill a Marine with their own Grenade.
Sbloccato in data 20 mag 2021, ore 13:57

Mega Hertz

Kill 5 Enemies with one Grenade.
Sbloccato in data 22 dic 2019, ore 14:40

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Sbloccato in data 5 giu 2021, ore 9:07

Permeable Infrastructure

Use the alternate path in Office Complex.
Sbloccato in data 29 giu 2017, ore 5:19

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Sbloccato in data 5 giu 2021, ore 9:53

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Sbloccato in data 26 giu 2017, ore 1:15

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Sbloccato in data 26 giu 2017, ore 0:34

Quantum Capacitance

Overcharge it anyway.
Sbloccato in data 4 giu 2021, ore 15:04

Rare Specimen

Send the Hidden Hat to Xen.
Sbloccato in data 6 giu 2021, ore 13:09

Remote Detonation

Kill a Barnacle with a Satchel.
Sbloccato in data 4 giu 2021, ore 14:25

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Sbloccato in data 26 giu 2017, ore 0:50

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Sbloccato in data 4 giu 2021, ore 14:01

Universal Gravitation

Get killed by your own Snarks.
Sbloccato in data 4 giu 2021, ore 15:16

Prolific Popper

Kill all Protozoans in the Borderworld.
Sbloccato in data 7 giu 2021, ore 10:59

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Sbloccato in data 7 giu 2021, ore 10:55

The Rarest Specimen

Carry the Hidden Hat to Endgame.
Sbloccato in data 6 giu 2021, ore 13:37

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Sbloccato in data 6 giu 2021, ore 12:59

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Sbloccato in data 7 giu 2021, ore 11:49

xen when

Wait too long to jump into the Lambda Teleporter.
Sbloccato in data 6 giu 2021, ore 13:10

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Sbloccato in data 17 mag 2021, ore 9:56

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Sbloccato in data 17 mag 2021, ore 8:56

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Sbloccato in data 6 giu 2021, ore 13:55

Following the Rules

Use the welcome mat.
Sbloccato in data 6 giu 2021, ore 14:05

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Sbloccato in data 6 giu 2021, ore 17:03

Gonad Glider

Get whacked into oblivion in the ledge fight.
Sbloccato in data 6 giu 2021, ore 14:38

Post-Mortem Interval

Find each member of the missing research teams.
Sbloccato in data 6 giu 2021, ore 16:57

The Plan

Use Cyanogen to kill Gonarch.
Sbloccato in data 6 giu 2021, ore 16:53

Unquestionably Ethical

Don't use the Cyanogen and let the Gonarch live.
Sbloccato in data 6 giu 2021, ore 16:54

Contest Propellant

Find the snack supply canister.
Sbloccato in data 6 giu 2021, ore 17:25

Laser Immunization

Complete Interloper without taking any laser damage.
Sbloccato in data 7 giu 2021, ore 10:55

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Sbloccato in data 7 giu 2021, ore 11:17

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Sbloccato in data 6 giu 2021, ore 17:15

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Sbloccato in data 6 giu 2021, ore 12:22

Late for Work

Defeat Nihilanth in under 4 minutes.​
Sbloccato in data 6 giu 2021, ore 12:46

Limitless Potential

Accept G-Man’s offer of employment.
Sbloccato in data 6 mar 2020, ore 17:05

Rather an Anticlimax

Decline G-Man’s offer of employment.
Sbloccato in data 6 mar 2020, ore 17:06

Pepperoni Precipitation

View the *other* secret ending.
Sbloccato in data 7 giu 2021, ore 12:26

Well-Done

Cook a Grenade for too long.
Sbloccato in data 17 mag 2021, ore 9:57