Black Mesa achievements

11.09%

Unified Coupling Theorum

Help the Barnacle and Headcrab find true love.

12.11%

Ethically Questionable

Conduct all of the questionable research experiments.

12.54%

Kinetic Repulsion

Kill a Marine with their own grenade.

12.62%

Futile Resistance

Kill 10 enemies with Snarks.

14.32%

Hyper Saturation Conundrum

Drown in Lambda Core's coolant.

16.70%

Digital Wizardry

Kill 10 enemies with a reprogrammed Sentry.

18.87%

Resonance Procrastinator

Refuse to insert the specimen into the Anti-Mass Spectrometer.

19.04%

Nuclear Fishin'

Kill an Icthyosaur with either the Tau or Gluon.

19.21%

Remote Detonation

Kill a Barnacle with a Satchel.

19.97%

Universal Gravitation

Get killed by your own Snarks.

22.23%

Well-Done

Cook a Grenade for too long.

25.37%

Calculated Trajectory

Kill 10 Airborne Headcrabs using the Shotgun.