| 1 |   | 74.60% | Wake Up Call: Survive the manual override | ACH.SURVIVE_CONTAINER_RIDE | 
                
                    | 2 |   | 65.20% | You Monster: Reunite with GLaDOS | ACH.WAKE_UP | 
                
                    | 3 |   | 63.10% | Undiscouraged: Complete the first Thermal Discouragement Beam test | ACH.LASER | 
                
                    | 4 |   | 53.70% | Bridge Over Troubling Water: Complete the first Hard Light Bridge test | ACH.BRIDGE | 
                
                    | 5 |   | 46.80% | SaBOTour: Make a break for it | ACH.BREAK_OUT | 
                
                    | 6 |   | 45.80% | Stalemate Associate: Press the button! | ACH.STALEMATE_ASSOCIATE | 
                
                    | 7 |   | 43.10% | Vertically Unchallenged: Master the Repulsion Gel | ACH.BLUE_GEL | 
                
                    | 8 |   | 41.20% | Tater Tote: Carry science forward | ACH.ADDICTED_TO_SPUDS | 
                
                    | 9 |   | 39.60% | Stranger Than Friction: Master the Propulsion Gel | ACH.ORANGE_GEL | 
                
                    | 10 |   | 38.50% | White Out: Complete the first Conversion Gel test | ACH.WHITE_GEL | 
                
                    | 11 |   | 37.20% | Dual Pit Experiment: Do the same test twice | ACH.TRIVIAL_TEST | 
                
                    | 12 |   | 35.30% | Tunnel of Funnel: Master the Excursion Funnel | ACH.TRACTOR_BEAM | 
                
                    | 13 |   | 34.90% | Scanned Alone: Stand in a defective turret detector | ACH.NOT_THE_DROID | 
                
                    | 14 |   | 34.60% | The Part Where He Kills You: This is that part | ACH.WHEATLEY_TRIES_TO | 
                
                    | 15 |   | 34.30% | Lunacy: That just happened | ACH.SHOOT_THE_MOON | 
                
                    | 16 |   | 32.10% | Bridge Building: Complete all test chambers in the Hard-Light Surfaces co-op course | ACH.HUG_NAME | 
                
                    | 17 |   | 31.10% | No Hard Feelings: Save a turret from redemption | ACH.SAVE_REDEMPTION_TURRET | 
                
                    | 18 |   | 29.10% | Drop Box: Place a cube on a button without touching the cube | ACH.BOX_HOLE_IN_ONE | 
                
                    | 19 |   | 28.50% | Good Listener: Take GLaDOS' escape advice | ACH.REENTER_TEST_CHAMBERS | 
                
                    | 20 |   | 27.10% | Gesticul-8: Perform all 8 gestures of your own volition in co-op | ACH.TAUNTS | 
                
                    | 21 |   | 26.30% | Obstacle Building: Complete all test chambers in the Excursion Funnels co-op course | ACH.EXCURSION_FUNNELS | 
                
                    | 22 |   | 24.50% | Preservation of Mass: Break the rules in Test Chamber 07 | ACH.SAVE_CUBE | 
                
                    | 23 |   | 21.20% | You Saved Science: Complete all test chambers in all courses of co-op | ACH.NEW_BLOOD | 
                
                    | 24 |   | 11.70% | Portrait of a Lady: Find a hidden portrait | ACH.PORTRAIT | 
                
                    | 25 |   | 10.70% | Ship Overboard: Discover the missing experiment | ACH.NO_BOAT | 
                
                    | 26 |   | 9.80% | Can't Touch This: Dance in front of a turret blocked by a hard light bridge in co-op | ACH.YOU_MONSTER | 
                
                    | 27 |   | 8.90% | Asking for Trouble: Taunt GLaDOS in front of a camera in each of the five co-op courses | ACH.TAUNT_CAMERA | 
                
                    | 28 |   | 8.80% | Pturretdactyl: Use an Aerial Faith Plate to launch a turret | ACH.LAUNCH_TURRET | 
                
                    | 29 |   | 7.80% | Pit Boss: Show that pit who's boss | ACH.COMPLIANT | 
                
                    | 30 |   | 7.30% | Door Prize: Examine all the vitrified test chamber doors | ACH.A3_DOORS | 
                
                    | 31 |   | 6.90% | Schrodinger's Catch: Catch a blue-painted box before it touches the ground | ACH.CATCH_CRAZY_BOX | 
                
                    | 32 |   | 6.90% | Four Ring Circus: Enter 4 different portals without touching the ground in co-op | ACH.FOUR_PORTALS | 
                
                    | 33 |   | 6.60% | You Made Your Point: Refuse to solve the first test in Chapter 8 | ACH.DEFIANT | 
                
                    | 34 |   | 5.80% | Narbacular Drop: Place a portal under your co-op partner while they are gesturing | ACH.PORTAL_TAUNT | 
                
                    | 35 |   | 5.80% | Professor Portal: After completing co-op, complete Calibration Course online with a friend who hasn’t played before | ACH.TEACHER | 
                
                    | 36 |   | 5.50% | Final Transmission: Find the hidden signal in one of the Rat Man's dens | ACH.CLEAN_UP | 
                
                    | 37 |   | 4.60% | Empty Gesture: Drop your co-op partner in goo while they are gesturing by removing the bridge under them | ACH.PARTNER_DROP | 
                
                    | 38 |   | 4.50% | Friends List With Benefits: While playing co-op, hug 3 different people on your friends list | ACH.SPREAD_THE_LOVE | 
                
                    | 39 |   | 4.00% | Overclocker: Complete Test Chamber 10 in 70 seconds | ACH.SPEED_RUN_LEVEL | 
                
                    | 40 |   | 3.70% | Smash TV: Break 11 test chamber monitors | ACH.BREAK_MONITORS | 
                
                    | 41 |   | 3.60% | Iron Grip: Never lose a cube in Chamber 6 of the Mass and Velocity co-op course | ACH.NICE_CATCH | 
                
                    | 42 |   | 3.50% | Party of Three: Find the hidden companion cube in co-op test chamber | ACH.PARTY_OF_THREE | 
                
                    | 43 |   | 3.00% | Triple Crown: Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each | ACH.SPEED_RUN_COOP | 
                
                    | 44 |   | 2.70% | Portal Conservation Society: Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements | ACH.LIMITED_PORTALS | 
                
                    | 45 |   | 2.60% | Talent Show: Never lose a cube in Chamber 6 of the Mobility Gels co-op course | ACH.SUMMER_SALE | 
                
                    | 46 |   | 2.40% | Still Alive: Complete Course 4 with neither you nor your co-op partner dying | ACH.STAYING_ALIVE |