Unlockable How to Unlock Air Show Perform 2 aerial gestures before touching the ground in co-op Asking for Trouble Taunt GLaDOS in front of a camera in each of the five co-op courses Bridge Building Complete all test chambers in the Hard-Light Surfaces co-op courses Bridge Over Troubling Water Complete the first Hard Light Bridge test Can't Touch This Dance in front of a turret blocked by a hard light bridge in co-op Confidence Building Complete all test chambers in the Mass and Velocity co-op courses Door Prize Examine all the vitrified test chamber doors Drop Box Place a cube on a button without touching the cube Dual Pit Experiment Do the same test twice Empty Gesture Drop your co-op partner in goo while they are gesturing by removing the bridge under them Final Transmission Find the hidden signal in one of the Rat Man's dens Four Ring Circus Enter 4 different portals without touching the ground in co-op Friends List with Benefits While playing co-op, hug 3 different people on your friends list Gesticul-8 Perform all 8 gestures of your own volition in co-op Good Listener Take GLaDOS' escape advice High Five Celebrate your cooperative calibration success Iron Grip Never lose a cube in Chamber 6 of the Mass and Velocity co-op course Lunacy That just happened Narbacular Drop Place a portal under your co-op partner while they are gesturing No Hard Feelings Save a turret from redemption Obstacle Building Complete all test chambers in the Excursion Funnels co-op course Overclocker Complete Test Chamber 10 in 70 seconds Party of Three Find the hidden companion cube in co-op test chamber Pit Boss Show that pit who's boss Portal Conservation Society Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements Portrait of a Lady Find a hidden portrait Preservation of Mass Break the rules in Test Chamber 07 Professor Portal After completing co-op, complete Calibration Course online with a friend who hasn't played before Pturretdactyl Use an Aerial Faith Plate to launch a turret Rock Portal Scissors Win 3 co-op games of rock-paper-scissors in a row SaBOTour Make a break for it Scanned Alone Stand in a defective turret detector Schrodinger's Catch Catch a blue-painted box before it touches the ground Ship Overboard Discover the missing experiment Smash TV Break 11 test chamber monitors Stalemate Associate Press the button! Still Alive Complete Course 4 with neither you nor your co-op partner dying Stranger Than Friction Master the Propulsion Gel Talent Show Never lose a cube in Chamber 6 of the Mobility Gels co-op course Tater Tote Carry science forward Team Building Complete all test chambers in the Team Building co-op course The Part Where He Kills You This is that part Triple Crown Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each Tunnel of Funnel Master the Excursion Funnel Vertically Unchallenged Master the Repulsion Gel Wake Up Call Survive the manual override White Out Complete the first Conversion Gel test You Made your Point Refuse to solve the first test in Chapter 8 You Monster Reunite with GlaDOS You Saved Science Complete all test chambers in all co-op courses
Contributed By: _Genesis.
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