Realizare	Jucători care au deblocat-o
Wake Up Call Survive the manual override	74,0%
You Monster Reunite with GLaDOS	64,7%
Undiscouraged Complete the first Thermal Discouragement Beam test	62,6%
High Five Celebrate your cooperative calibration success	58,5%
Bridge Over Troubling Water Complete the first Hard Light Bridge test	53,2%
Team Building Complete all test chambers in the Team Building co-op course	49,4%
SaBOTour Make a break for it	46,4%
Stalemate Associate Press the button!	45,5%
Vertically Unchallenged Master the Repulsion Gel	42,8%
Confidence Building Complete all test chambers in the Mass and Velocity co-op course	40,9%
Tater Tote Carry science forward	40,9%
Stranger Than Friction Master the Propulsion Gel	39,3%
White Out Complete the first Conversion Gel test	38,2%
Dual Pit Experiment Do the same test twice	36,9%
Tunnel of Funnel Master the Excursion Funnel	35,1%
Scanned Alone Stand in a defective turret detector	34,7%
The Part Where He Kills You This is that part	34,4%
Lunacy That just happened	34,1%
Air Show Perform 2 aerial gestures before touching the ground in co-op	33,2%
Bridge Building Complete all test chambers in the Hard-Light Surfaces co-op course	32,0%
No Hard Feelings Save a turret from redemption	31,0%
Drop Box Place a cube on a button without touching the cube	28,9%
Good Listener Take GLaDOS' escape advice	28,3%
Gesticul-8 Perform all 8 gestures of your own volition in co-op	27,1%
Obstacle Building Complete all test chambers in the Excursion Funnels co-op course	26,3%
Preservation of Mass Break the rules in Test Chamber 07	24,4%
You Saved Science Complete all test chambers in all courses of co-op	21,2%
Portrait of a Lady Find a hidden portrait	11,6%
Ship Overboard Discover the missing experiment	10,7%
Can't Touch This Dance in front of a turret blocked by a hard light bridge in co-op	9,8%
Rock Portal Scissors Win 3 co-op games of rock-paper-scissors in a row	9,8%
Asking for Trouble Taunt GLaDOS in front of a camera in each of the five co-op courses	8,9%
Pturretdactyl Use an Aerial Faith Plate to launch a turret	8,7%
Pit Boss Show that pit who's boss	7,9%
Door Prize Examine all the vitrified test chamber doors	7,2%
Schrodinger's Catch Catch a blue-painted box before it touches the ground	6,9%
Four Ring Circus Enter 4 different portals without touching the ground in co-op	6,8%
You Made Your Point Refuse to solve the first test in Chapter 8	6,5%
Professor Portal After completing co-op, complete Calibration Course online with a friend who hasn’t played before	5,9%
Narbacular Drop Place a portal under your co-op partner while they are gesturing	5,8%
Final Transmission Find the hidden signal in one of the Rat Man's dens	5,4%
Empty Gesture Drop your co-op partner in goo while they are gesturing by removing the bridge under them	4,6%
Friends List With Benefits While playing co-op, hug 3 different people on your friends list	4,5%
Overclocker Complete Test Chamber 10 in 70 seconds	4,0%
Smash TV Break 11 test chamber monitors	3,7%
Iron Grip Never lose a cube in Chamber 6 of the Mass and Velocity co-op course	3,6%
Party of Three Find the hidden companion cube in co-op test chamber	3,5%
Triple Crown Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each	3,0%
Portal Conservation Society Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements	2,8%
Talent Show Never lose a cube in Chamber 6 of the Mobility Gels co-op course	2,7%
Still Alive Complete Course 4 with neither you nor your co-op partner dying	2,4%