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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 1 giu 2017, ore 19:11

Caffeine Extraction

Perform surgical caffeine extraction from 20 vending machines.
Sbloccato in data 1 giu 2017, ore 19:35

Calculated Trajectory

Kill 10 airborne Headcrabs using the Shotgun.
Sbloccato in data 3 giu 2017, ore 19:33

Centripetal Attraction

Kill 20 Enemies with the Hivehand.
Sbloccato in data 4 giu 2017, ore 14:23

Convection Refinement

Ruin the microwave casserole.
Sbloccato in data 1 giu 2017, ore 19:08

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Sbloccato in data 3 giu 2017, ore 21:26

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Sbloccato in data 4 giu 2017, ore 14:29

Ethically Questionable

Conduct all of the questionable research experiments.
Sbloccato in data 3 giu 2017, ore 22:57

Futile Resistance

Kill 10 Enemies with Snarks.
Sbloccato in data 4 giu 2017, ore 14:43

Gray Matter Propulsion

Headshot 20 Enemies with the .357 Magnum.
Sbloccato in data 2 giu 2017, ore 19:12

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Sbloccato in data 4 giu 2017, ore 15:27

Inflammatory Actions

Kill a Headcrab using fire.
Sbloccato in data 1 giu 2017, ore 19:41

Kinetic Repulsion

Kill a Marine with their own Grenade.
Sbloccato in data 3 giu 2017, ore 19:48

Mega Hertz

Kill 5 Enemies with one Grenade.
Sbloccato in data 1 giu 2017, ore 20:25

Nuclear Fishin'

Kill an Ichthyosaur with either the Tau or Gluon.
Sbloccato in data 3 giu 2017, ore 23:27

Permeable Infrastructure

Use the alternate path in Office Complex.
Sbloccato in data 1 giu 2017, ore 20:20

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Sbloccato in data 4 giu 2017, ore 15:23

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Sbloccato in data 3 giu 2017, ore 23:31

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Sbloccato in data 1 giu 2017, ore 19:02

Quantum Capacitance

Overcharge it anyway.
Sbloccato in data 3 giu 2017, ore 22:53

Rare Specimen

Send the Hidden Hat to Xen.
Sbloccato in data 4 giu 2017, ore 18:11

Remote Detonation

Kill a Barnacle with a Satchel.
Sbloccato in data 2 giu 2017, ore 19:38

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Sbloccato in data 1 giu 2017, ore 19:23

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.
Sbloccato in data 4 giu 2017, ore 15:37

Universal Gravitation

Get killed by your own Snarks.
Sbloccato in data 3 giu 2017, ore 22:48

Prolific Popper

Kill all Protozoans in the Borderworld.
Sbloccato in data 9 mag 2020, ore 20:26

PhD in Pacifism

Don't kill any Vortigaunts in the Borderworld.
Sbloccato in data 4 mag 2020, ore 19:07

The Rarest Specimen

Carry the Hidden Hat to Endgame.
Sbloccato in data 13 mag 2020, ore 19:38

One Step Ahead

Kill 10 Enemies with Tripmines​​.
Sbloccato in data 3 mag 2020, ore 18:13

Stealth Technology

Escape the Hangar in Surface Tension without alerting the Soldiers.
Sbloccato in data 3 mag 2020, ore 19:32

xen when

Wait too long to jump into the Lambda Teleporter.
Sbloccato in data 18 apr 2020, ore 18:59

Our Brains And Your Brawn

Assemble all the possible Scientists and Guards at the end of Office Complex.
Sbloccato in data 9 mag 2020, ore 18:56

Less Than Desirable Consequences

Die in the AMS Beam before starting the experiment.
Sbloccato in data 28 apr 2020, ore 16:23

Orbital Trajectory

Skip the opening Xen island with a secret jump.​
Sbloccato in data 3 mag 2020, ore 20:06

Following the Rules

Use the welcome mat.
Sbloccato in data 28 apr 2020, ore 16:30

Doctor’s Signature

Deliver the finishing blow to Gonarch with your Crowbar.
Sbloccato in data 28 apr 2020, ore 18:31

Gonad Glider

Get whacked into oblivion in the ledge fight.
Sbloccato in data 30 apr 2020, ore 16:59

Post-Mortem Interval

Find each member of the missing research teams.
Sbloccato in data 30 apr 2020, ore 18:08

The Plan

Use Cyanogen to kill Gonarch.
Sbloccato in data 11 mag 2020, ore 19:52

Unquestionably Ethical

Don't use the Cyanogen and let the Gonarch live.
Sbloccato in data 18 apr 2020, ore 19:03

Contest Propellant

Find the snack supply canister.
Sbloccato in data 18 apr 2020, ore 18:37

Laser Immunization

Complete Interloper without taking any laser damage.
Sbloccato in data 30 apr 2020, ore 20:39

Black Mesa Decathlon Winner

Escape the Gargantua’s Lair without taking any damage from Gargantuas.
Sbloccato in data 9 mag 2020, ore 21:17

Anti-Matter Over Mind

Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
Sbloccato in data 11 apr 2020, ore 20:26

Specimen GG

Take out all three Healing Crystals in Nihilanth’s Chamber at the same time​.
Sbloccato in data 18 apr 2020, ore 22:42

Late for Work

Defeat Nihilanth in under 4 minutes.​
Sbloccato in data 16 mag 2020, ore 20:07

Limitless Potential

Accept G-Man’s offer of employment.
Sbloccato in data 18 apr 2020, ore 16:39

Rather an Anticlimax

Decline G-Man’s offer of employment.
Sbloccato in data 18 apr 2020, ore 16:45

Pepperoni Precipitation

View the *other* secret ending.
Sbloccato in data 13 mag 2020, ore 19:48

Well-Done

Cook a Grenade for too long.
Sbloccato in data 8 mar 2020, ore 21:05