Achievement Unlocked Visibility Global Unlocks
Door Prize
Examine all the vitrified test chamber doors 		7.5%
Tater Tote
Carry science forward 		42.5%
Vertically Unchallenged
Master the Repulsion Gel 		44.5%
Drop Box
Place a cube on a button without touching the cube 		29.7%
Smash TV
Break 11 test chamber monitors 		3.7%
SaBOTour
Make a break for it 		48.2%
Bridge Over Troubling Water
Complete the first Hard Light Bridge test 		55.2%
Schrodinger's Catch
Catch a blue-painted box before it touches the ground 		7.0%
Final Transmission
Find the hidden signal in one of the Rat Man's dens 		5.7%
Pit Boss
Show that pit who's boss 		8.0%
You Made Your Point
Refuse to solve the first test in Chapter 8 		6.8%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course 		26.4%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op 		6.9%
High Five
Celebrate your cooperative calibration success 		58.8%
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course 		32.2%
Undiscouraged
Complete the first Thermal Discouragement Beam test 		64.7%
Pturretdactyl
Use an Aerial Faith Plate to launch a turret 		9.1%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements 		2.7%
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course 		41.1%
You Saved Science
Complete all test chambers in all courses of co-op 		21.3%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course 		3.6%
Ship Overboard
Discover the missing experiment 		11.0%
Scanned Alone
Stand in a defective turret detector 		35.9%
Stranger Than Friction
Master the Propulsion Gel 		40.9%
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them 		4.6%
Party of Three
Find the hidden companion cube in co-op test chamber 		3.6%
Narbacular Drop
Place a portal under your co-op partner while they are gesturing 		5.9%
Portrait of a Lady
Find a hidden portrait 		12.1%
Good Listener
Take GLaDOS' escape advice 		29.4%
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row 		9.9%
Preservation of Mass
Break the rules in Test Chamber 07 		25.2%
No Hard Feelings
Save a turret from redemption 		31.9%
Lunacy
That just happened 		35.3%
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each 		3.0%
Overclocker
Complete Test Chamber 10 in 70 seconds 		4.0%
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list 		4.4%
Stalemate Associate
Press the button! 		47.2%
Still Alive
Complete Course 4 with neither you nor your co-op partner dying 		2.3%
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course 		2.6%
Wake Up Call
Survive the manual override 		76.0%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses 		9.1%
Gesticul-8
Perform all 8 gestures of your own volition in co-op 		27.3%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before 		5.8%
Team Building
Complete all test chambers in the Team Building co-op course 		49.6%
Tunnel of Funnel
Master the Excursion Funnel 		36.4%
Dual Pit Experiment
Do the same test twice 		38.3%
You Monster
Reunite with GLaDOS 		66.7%
The Part Where He Kills You
This is that part 		35.6%
White Out
Complete the first Conversion Gel test 		39.7%
Air Show
Perform 2 aerial gestures before touching the ground in co-op 		33.9%
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op 		10.0%