Brownian Motion
Pass the toilet paper to the Scientist in need.
Hidden achievement
Details are hidden to users who have not unlocked it.
63.1% of players unlocked this.
Caffeine Extraction
Perform surgical caffeine extraction from 20 vending machines.
Hidden achievement
Details are hidden to users who have not unlocked it.
24.1% of players unlocked this.
Calculated Trajectory
Kill 10 airborne Headcrabs using the Shotgun.
Hidden achievement
Details are hidden to users who have not unlocked it.
14.1% of players unlocked this.
Centripetal Attraction
Kill 20 Enemies with the Hivehand.
Hidden achievement
Details are hidden to users who have not unlocked it.
25% of players unlocked this.
Convection Refinement
Ruin the microwave casserole.
Hidden achievement
Details are hidden to users who have not unlocked it.
51.2% of players unlocked this.
Dead Reckoning
Kill an Assassin with the .357 Magnum.
Hidden achievement
Details are hidden to users who have not unlocked it.
23% of players unlocked this.
Digital Wizardry
Kill 10 enemies with a reprogrammed Sentry.
Hidden achievement
Details are hidden to users who have not unlocked it.
9.5% of players unlocked this.
Ethically Questionable
Conduct all of the questionable research experiments.
Hidden achievement
Details are hidden to users who have not unlocked it.
5.8% of players unlocked this.
Futile Resistance
Kill 10 Enemies with Snarks.
Hidden achievement
Details are hidden to users who have not unlocked it.
7.3% of players unlocked this.
Gray Matter Propulsion
Headshot 20 Enemies with the .357 Magnum.
Hidden achievement
Details are hidden to users who have not unlocked it.
40.1% of players unlocked this.
Hyper Saturation Conundrum
Drown in Lambda Core's coolant.
Hidden achievement
Details are hidden to users who have not unlocked it.
6.5% of players unlocked this.
Inflammatory Actions
Kill a Headcrab using fire.
Hidden achievement
Details are hidden to users who have not unlocked it.
25.1% of players unlocked this.
Kinetic Repulsion
Kill a Marine with their own Grenade.
Hidden achievement
Details are hidden to users who have not unlocked it.
5.8% of players unlocked this.
Mega Hertz
Kill 5 Enemies with one Grenade.
Hidden achievement
Details are hidden to users who have not unlocked it.
18.8% of players unlocked this.
Nuclear Fishin'
Kill an Ichthyosaur with either the Tau or Gluon.
Hidden achievement
Details are hidden to users who have not unlocked it.
12.4% of players unlocked this.
Permeable Infrastructure
Use the alternate path in Office Complex.
Hidden achievement
Details are hidden to users who have not unlocked it.
24.3% of players unlocked this.