50Achievements
Wake Up Call
Survive the manual override
(69.5%)
You Monster
Reunite with GLaDOS
(60.8%)
Undiscouraged
Complete the first Thermal Discouragement Beam test
(58.6%)
Bridge Over Troubling Water
Complete the first Hard Light Bridge test
(48.5%)
SaBOTour
Make a break for it
(41.1%)
Stalemate Associate
Press the button!
(40.4%)
Tater Tote
Carry science forward
(35.8%)
Vertically Unchallenged
Master the Repulsion Gel
(37.7%)
Stranger Than Friction
Master the Propulsion Gel
(34.4%)
White Out
Complete the first Conversion Gel test
(33.3%)
Tunnel of Funnel
Master the Excursion Funnel
(30.1%)
Dual Pit Experiment
Do the same test twice
(31.9%)
The Part Where He Kills You
This is that part
(29.3%)
Lunacy
That just happened
(29.0%)
Drop Box
Place a cube on a button without touching the cube
(22.9%)
Overclocker
Complete Test Chamber 10 in 70 seconds
(5.5%)
Pit Boss
Show that pit who's boss
(8.6%)
Preservation of Mass
Break the rules in Test Chamber 07
(21.3%)
Pturretdactyl
Use an Aerial Faith Plate to launch a turret
(10.3%)
Final Transmission
Find the hidden signal in one of the Rat Man's dens
(7.0%)
Good Listener
Take GLaDOS' escape advice
(25.4%)
Scanned Alone
Stand in a defective turret detector
(32.7%)
No Hard Feelings
Save a turret from redemption
(26.0%)
Schrodinger's Catch
Catch a blue-painted box before it touches the ground
(6.7%)
Ship Overboard
Discover the missing experiment
(11.9%)
Door Prize
Examine all the vitrified test chamber doors
(8.3%)
Portrait of a Lady
Find a hidden portrait
(11.8%)
You Made Your Point
Refuse to solve the first test in Chapter 8
(8.2%)
Smash TV
Break 11 test chamber monitors
(4.2%)
High Five
Celebrate your cooperative calibration success
(59.0%)
Team Building
Complete all test chambers in the Team Building co-op course
(50.5%)
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
(34.9%)
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
(23.6%)
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
(18.5%)
You Saved Science
Complete all test chambers in all courses of co-op
(15.9%)
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
(4.0%)
Gesticul-8
Perform all 8 gestures of your own volition in co-op
(19.9%)
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op
(11.4%)
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
(7.1%)
Party of Three
Find the hidden companion cube in co-op test chamber
(4.4%)
Narbacular Drop
Place a portal under your co-op partner while they are gesturing
(9.3%)
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
(1.9%)
Air Show
Perform 2 aerial gestures before touching the ground in co-op
(23.2%)
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
(2.9%)
Four Ring Circus
Enter 4 different portals without touching the ground in co-op
(6.6%)
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
(2.4%)
Still Alive
Complete Course 4 with neither you nor your co-op partner dying
(1.6%)
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
(8.5%)
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row
(13.6%)
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list
(1.7%)