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20 of 25 (80%) achievements earned:

Personal Achievements
 
Unlocked Dec 30, 2017 @ 9:09am

Brownian Motion

Pass the toilet paper to the scientist in need.
Unlocked Dec 30, 2017 @ 9:13am

Caffeine Extraction

Perform surgical caffeine extraction from 20 machines.
Unlocked Jan 2, 2018 @ 1:48pm

Calculated Trajectory

Kill 10 Airborne Headcrabs using the Shotgun.
Unlocked Jan 16, 2018 @ 4:21pm

Centripetal Attraction

Kill 20 enemies with the Hivehand.
Unlocked Dec 30, 2017 @ 9:08am

Convection Refinement

Ruin the microwave casserole.
Unlocked Jan 2, 2018 @ 1:54pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked Mar 12 @ 11:15am

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.
Unlocked Jan 6, 2018 @ 9:02am

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked Nov 27, 2018 @ 1:33pm

Futile Resistance

Kill 10 enemies with Snarks.
Unlocked Dec 31, 2017 @ 11:10am

Gray Matter Propulsion

Headshot 20 enemies with the .357 magnum.
Unlocked Feb 22, 2018 @ 5:39pm

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked Sep 16, 2018 @ 11:05am

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked Dec 30, 2017 @ 11:02am

Mega Hertz

Kill 5 enemies with one grenade.
Unlocked Jan 8, 2018 @ 4:13pm

Nuclear Fishin'

Kill an Icthyosaur with either the Tau or Gluon.
Unlocked Sep 16, 2018 @ 11:57am

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked Feb 22, 2018 @ 5:36pm

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.
Unlocked Dec 30, 2017 @ 12:22pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked Dec 30, 2017 @ 3:53pm

Quantum Capacitance

Overcharge it anyway.
Unlocked Dec 31, 2017 @ 11:31am

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked Jan 6, 2018 @ 8:49am

Universal Gravitation

Get killed by your own Snarks.



Kinetic Repulsion

Kill a Marine with their own grenade.

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.