| 1 |   | 61.00% | Brownian Motion: Pass the toilet paper to the Scientist in need. | BMS_BROWN_MOTION | 
                
                    | 2 |   | 50.00% | Convection Refinement: Ruin the microwave casserole. | BMS_FLAVOR_TRANSFORMATION | 
                
                    | 3 |   | 36.40% | Gray Matter Propulsion: Headshot 20 Enemies with the .357 Magnum. | BMS_GRAY_MATTER_PROPULSION | 
                
                    | 4 |   | 33.00% | Prophylactic Suggested: Get overtaken by a Headcrab's ample anterior. | BMS_PROPHYLACTIC_SUGGESTED | 
                
                    | 5 |   | 26.80% | Anti-Matter Over Mind: Kill a Controller without killing any of its mind-controlled Vortigaunt slaves. | BMS_ANTI_MATTER_OVER_MIND | 
                
                    | 6 |   | 25.90% | Premature Expulsion: Use an entire clip of Gluon ammo in one continuous shot. | BMS_CHARGING_MY_LASER | 
                
                    | 7 |   | 25.30% | Inflammatory Actions: Kill a Headcrab using fire. | BMS_KILL_IT_WITH_FIRE | 
                
                    | 8 |   | 24.10% | Limitless Potential: Accept G-Man’s offer of employment. | BMS_LIMITLES_POTENTIAL | 
                
                    | 9 |   | 23.10% | Permeable Infrastructure: Use the alternate path in Office Complex. | BMS_PERMEABLE_INFRASTRUCTURE | 
                
                    | 10 |   | 22.70% | Dead Reckoning: Kill an Assassin with the .357 Magnum. | BMS_DEAD_RECKONING | 
                
                    | 11 |   | 22.60% | Centripetal Attraction: Kill 20 Enemies with the Hivehand. | BMS_CENTRIPETAL_ATTRACTION | 
                
                    | 12 |   | 21.00% | Caffeine Extraction: Perform surgical caffeine extraction from 20 vending machines. | BMS_CAFFEINE_FREAK | 
                
                    | 13 |   | 18.60% | Quantum Capacitance: Overcharge it anyway. | BMS_QUANTUM_CAPACITANCE | 
                
                    | 14 |   | 18.40% | Mega Hertz: Kill 5 Enemies with one Grenade. | BMS_MEGA_HERTZ | 
                
                    | 15 |   | 18.20% | Well-Done: Cook a Grenade for too long. | BMS_WELL_DONE | 
                
                    | 16 |   | 16.20% | Proverbial Tinkerer: Interfere with the alarm and laptop in Anomalous Materials. | BMS_PRESS_THEIR_BUTTONS | 
                
                    | 17 |   | 15.90% | Rather an Anticlimax: Decline G-Man’s offer of employment. | BMS_ANTICLIMAX | 
                
                    | 18 |   | 15.20% | Less Than Desirable Consequences: Die in the AMS Beam before starting the experiment. | BMS_LESS_THAN_DES_CONSEQUENCES | 
                
                    | 19 |   | 13.30% | Calculated Trajectory: Kill 10 airborne Headcrabs using the Shotgun. | BMS_CALCULATED_TRAJECTORY | 
                
                    | 20 |   | 12.00% | Nuclear Fishin': Kill an Ichthyosaur with either the Tau or Gluon. | BMS_NUCLEAR_FISHIN | 
                
                    | 21 |   | 11.40% | PhD in Pacifism: Don't kill any Vortigaunts in the Borderworld. | BMS_PHD_PACIFISM | 
                
                    | 22 |   | 11.00% | Remote Detonation: Kill a Barnacle with a Satchel. | BMS_INDIGESTION | 
                
                    | 23 |   | 10.50% | Universal Gravitation: Get killed by your own Snarks. | BMS_FRIENDS_LIKE_THESE | 
                
                    | 24 |   | 10.40% | Contest Propellant: (Note: this is a hidden achievement that has not been released to the public yet) | BMS_CONTEST_PROPELLENT | 
                
                    | 25 |   | 10.30% | Stealth Technology: Escape the Hangar in Surface Tension without alerting the Soldiers. | BMS_STEALTH_TECH | 
                
                    | 26 |   | 9.40% | Resonance Procrastinator: Refuse to insert the specimen into the Anti-Mass Spectrometer. | BMS_RESONANCE_PROCRASTINATOR | 
                
                    | 27 |   | 8.80% | Digital Wizardry: Kill 10 enemies with a reprogrammed Sentry. | BMS_DIGITAL_WIZARDRY | 
                
                    | 28 |   | 6.90% | Futile Resistance: Kill 10 Enemies with Snarks. | BMS_LITTLE_FRIEND | 
                
                    | 29 |   | 6.20% | Unified Coupling Theorum: Help the Barnacle and Headcrab find true love. | BMS_COUPLING_THEORUM | 
                
                    | 30 |   | 5.90% | Hyper Saturation Conundrum: Drown in Lambda Core's coolant. | BMS_HYPER_SATURATION_CONUNDRUM | 
                
                    | 31 |   | 5.90% | Kinetic Repulsion: Kill a Marine with their own Grenade. | BMS_KINETIC_REPULSION | 
                
                    | 32 |   | 5.80% | One Step Ahead: Kill 10 Enemies with Tripmines. | BMS_ONE_STEP_AHEAD | 
                
                    | 33 |   | 5.70% | Gonad Glider: Get whacked into oblivion in the ledge fight. | BMS_GLIDER | 
                
                    | 34 |   | 5.20% | Ethically Questionable: Conduct all of the questionable research experiments. | BMS_ETHICALLY_QUESTIONABLE | 
                
                    | 35 |   | 5.00% | Our Brains And Your Brawn: Assemble all the possible Scientists and Guards at the end of Office Complex. | BMS_BRAIN_BRAWN | 
                
                    | 36 |   | 4.20% | xen when: (Note: this is a hidden achievement that has not been released to the public yet) | BMS_XEN_WEN | 
                
                    | 37 |   | 3.80% | Following the Rules: (Note: this is a hidden achievement that has not been released to the public yet) | BMS_FOLLOWING_RULES | 
                
                    | 38 |   | 3.70% | Orbital Trajectory: Skip the opening Xen island with a secret jump. | BMS_ORBITAL_TRAJ | 
                
                    | 39 |   | 3.50% | Black Mesa Decathlon Winner: Escape the Gargantua’s Lair without taking any damage from Gargantuas. | BMS_DECATHLON_WIN | 
                
                    | 40 |   | 3.20% | Late for Work: Defeat Nihilanth in under 4 minutes. | BMS_LATE_FOR_WORK | 
                
                    | 41 |   | 3.10% | Doctor’s Signature: Deliver the finishing blow to Gonarch with your Crowbar. | BMS_DOCTORS_SIGN | 
                
                    | 42 |   | 3.00% | Specimen GG: Take out all three Healing Crystals in Nihilanth’s Chamber at the same time. | BMS_SPECIMEN_GG | 
                
                    | 43 |   | 2.80% | Rare Specimen: Send the Hidden Hat to Xen. | BMS_RARE_SPECIMEN | 
                
                    | 44 |   | 2.40% | The Plan: (Note: this is a hidden achievement that has not been released to the public yet) | BMS_THE_PLAN | 
                
                    | 45 |   | 2.40% | Laser Immunization: Complete Interloper without taking any laser damage. | BMS_LASER_IMMUNIZATION | 
                
                    | 46 |   | 2.20% | Unquestionably Ethical: (Note: this is a hidden achievement that has not been released to the public yet) | BMS_UNQUES_ETHICAL | 
                
                    | 47 |   | 2.00% | Post-Mortem Interval: Find each member of the missing research teams. | BMS_POST_MORTEM | 
                
                    | 48 |   | 2.00% | The Rarest Specimen: (Note: this is a hidden achievement that has not been released to the public yet) | BMS_RAREREST_SPECIMEN | 
                
                    | 49 |   | 1.90% | Prolific Popper: Kill all Protozoans in the Borderworld. | BMS_PROFILIC_POPPER | 
                
                    | 50 |   | 1.80% | Pepperoni Precipitation: (Note: this is a hidden achievement that has not been released to the public yet) | BMS_PRECIPITATION |