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19 of 25 (76%) achievements earned:

Personal Achievements
Unlocked May 8, 2015 @ 10:26pm

Brownian Motion

Pass the toilet paper to the scientist in need.
Unlocked May 16, 2015 @ 10:51pm

Caffeine Extraction

Perform surgical caffeine extraction from 20 machines.
Unlocked May 15, 2015 @ 11:30pm

Calculated Trajectory

Kill 10 Airborne Headcrabs using the Shotgun.
Unlocked May 16, 2015 @ 10:56pm

Centripetal Attraction

Kill 20 enemies with the Hivehand.
Unlocked May 8, 2015 @ 10:24pm

Convection Refinement

Ruin the microwave casserole.
Unlocked Dec 2, 2017 @ 4:47pm

Dead Reckoning

Kill an Assassin with the .357 Magnum.
Unlocked May 14, 2015 @ 7:48pm

Ethically Questionable

Conduct all of the questionable research experiments.
Unlocked May 9, 2015 @ 8:54pm

Gray Matter Propulsion

Headshot 20 enemies with the .357 magnum.
Unlocked May 25, 2015 @ 5:27pm

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.
Unlocked May 8, 2015 @ 11:01pm

Inflammatory Actions

Kill a Headcrab using fire.
Unlocked May 25, 2015 @ 6:08pm

Kinetic Repulsion

Kill a Marine with their own grenade.
Unlocked May 25, 2015 @ 5:35pm

Nuclear Fishin'

Kill an Icthyosaur with either the Tau or Gluon.
Unlocked May 9, 2015 @ 8:33pm

Permeable Infrastructure

Use the alternate path in Office Complex.
Unlocked May 14, 2015 @ 7:40pm

Prophylactic Suggested

Get overtaken by a Headcrab's ample anterior.
Unlocked May 8, 2015 @ 10:18pm

Proverbial Tinkerer

Interfere with the alarm and laptop in Anomalous Materials.
Unlocked May 16, 2015 @ 3:55pm

Quantum Capacitance

Overcharge it anyway.
Unlocked May 10, 2015 @ 7:21pm

Remote Detonation

Kill a Barnacle with a Satchel.
Unlocked May 8, 2015 @ 10:49pm

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.
Unlocked May 16, 2015 @ 10:51pm

Universal Gravitation

Get killed by your own Snarks.

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

Futile Resistance

Kill 10 enemies with Snarks.

Mega Hertz

Kill 5 enemies with one grenade.

Premature Expulsion

Use an entire clip of Gluon ammo in one continuous shot.

Rare Specimen

Send the Hidden Hat to Xen.

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.