Brownian Motion
Not unlocked yetPass the toilet paper to the Scientist in need.
Caffeine Extraction
Not unlocked yetPerform surgical caffeine extraction from 20 vending machines.
Calculated Trajectory
Not unlocked yetKill 10 airborne Headcrabs using the Shotgun.
Centripetal Attraction
Not unlocked yetKill 20 Enemies with the Hivehand.
Convection Refinement
Not unlocked yetRuin the microwave casserole.
Dead Reckoning
Not unlocked yetKill an Assassin with the .357 Magnum.
Digital Wizardry
Not unlocked yetKill 10 enemies with a reprogrammed Sentry.
Ethically Questionable
Not unlocked yetConduct all of the questionable research experiments.
Futile Resistance
Not unlocked yetKill 10 Enemies with Snarks.
Gray Matter Propulsion
Not unlocked yetHeadshot 20 Enemies with the .357 Magnum.
Hyper Saturation Conundrum
Not unlocked yetDrown in Lambda Core's coolant.
Inflammatory Actions
Not unlocked yetKill a Headcrab using fire.
Kinetic Repulsion
Not unlocked yetKill a Marine with their own Grenade.
Mega Hertz
Not unlocked yetKill 5 Enemies with one Grenade.
Nuclear Fishin'
Not unlocked yetKill an Ichthyosaur with either the Tau or Gluon.
Permeable Infrastructure
Not unlocked yetUse the alternate path in Office Complex.
Premature Expulsion
Not unlocked yetUse an entire clip of Gluon ammo in one continuous shot.
Prophylactic Suggested
Not unlocked yetGet overtaken by a Headcrab's ample anterior.
Proverbial Tinkerer
Not unlocked yetInterfere with the alarm and laptop in Anomalous Materials.
Quantum Capacitance
Not unlocked yetOvercharge it anyway.
Rare Specimen
Not unlocked yetSend the Hidden Hat to Xen.
Remote Detonation
Not unlocked yetKill a Barnacle with a Satchel.
Resonance Procrastinator
Not unlocked yetRefuse to insert the specimen into the Anti-Mass Spectrometer.
Unified Coupling Theorum
Not unlocked yetHelp the Barnacle and Headcrab find true love.