Black Mesa: 100% Achievement Guide

• Brownian Motion
  Pass the toilet paper to the Scientist in need.
• Convection Refinement
  Ruin the microwave casserole.
• Gray Matter Propulsion
  Headshot 20 Enemies with the .357 Magnum.
• Prophylactic Suggested
  Get overtaken by a Headcrab’s ample anterior.
• Caffeine Extraction
  Perform surgical caffeine extraction from 20 vending machines.
• Centripetal Attraction
  Kill 20 Enemies with the Hivehand.
• Permeable Infrastructure
  Use the alternate path in Office Complex.
• Quantum Capacitance
  Overcharge it anyway.
• Inflammatory Actions
  Kill a Headcrab using fire.
• 
  Proverbial Tinkerer
  Interfere with the alarm and laptop in Anomalous Materials.
• Dead Reckoning
  Kill an Assassin with the .357 Magnum.
• Mega Hertz
  Kill 5 Enemies with one Grenade.
• Premature Expulsion
  Use an entire clip of Gluon ammo in one continuous shot.
• Universal Gravitation
  Get killed by your own Snarks.
• Calculated Trajectory
  Kill 10 airborne Headcrabs using the Shotgun.
• Resonance Procrastinator
  Refuse to insert the specimen into the Anti-Mass Spectrometer.
• Remote Detonation
  Kill a Barnacle with a Satchel.
• Nuclear Fishin’
  Kill an Ichthyosaur with either the Tau or Gluon.
• Digital Wizardry
  Kill 10 enemies with a reprogrammed Sentry.
• Futile Resistance
  Kill 10 Enemies with Snarks.
• Hyper Saturation Conundrum
  Drown in Lambda Core’s coolant.
• Ethically Questionable
  Conduct all of the questionable research experiments.
• Unified Coupling Theorum
  Help the Barnacle and Headcrab find true love.
• Kinetic Repulsion
  Kill a Marine with their own Grenade.
• Rare Specimen
  Send the Hidden Hat to Xen.

• Anti-Matter Over Mind
  Kill a Controller without killing any of its mind-controlled Vortigaunt slaves.
• Unquestionably Ethical
  Don’t use the Cyanogen and let the Gonarch live.
• Contest Propellant
  Find the snack supply canister.
• Laser Immunization
  Complete Interloper without taking any laser damage.
• Rather an Anticlimax
  Decline G-Man´s offer of employment.
• Black Mesa Decathlon Winner
  Escape the Gargantua´s Lair without taking any damage from Gargantuas.
• Specimen GG
  Take out all three Healing Crystals in Nihilanth´s Chamber at the same time.
• Late for Work
  Defeat Nihilanth in under 4 minutes.
• Limitless Potential
  Accept G-Man´s offer of employment.
• Post-Mortem Interval
  Find each member of the missing research teams.
• The Plan
  Use Cyanogen to kill Gonarch.
• Our Brains And Your Brawn
  Assemble all the possible Scientists and Guards at the end of Office Complex.
• Gonad Glider
  Get whacked into oblivion in the ledge fight.
• Doctor’s Signature
  Deliver the finishing blow to Gonarch with your Crowbar.
• Following the Rules
  Use the welcome mat.
• Orbital Trajectory
  Skip the opening Xen island with a secret jump.
• Less Than Desirable Consequences
  Die in the Test Chamber before starting the experiment.
• xen when
  Wait too long to jump into the Lambda Teleporter.
• Stealth Technology
  Escape the Hander in Surface Tension without alerting the Soldiers.
• One Step Ahead
  Kill 10 Enemies with Tripmines.
• The Rarest Specimen
  Carry the Hidden Hat to Endgame.
• PhD in Pacifism
  Don’t kill any Vortigaunts in the Borderworld.
• Prolific Popper
  Kill all Protozoans in the Borderworld.
• Pepperoni Precipitation
  View the “other” secret ending.

By Zachary