You Saved Science
Complete all test chambers in all courses of co-op
100 ✓ April 1st, 2013
Smash TV
Break 11 test chamber monitors
75 ✓ March 30th, 2013
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
75 ✓ April 1st, 2013
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list
50 ✓ April 1st, 2013
Overclocker
Complete Test Chamber 10 in 70 seconds
30 ✓ March 30th, 2013
Pit Boss
Show that pit who's boss
30 ✓ March 30th, 2013
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
25 ✓ March 31st, 2013
Party of Three
Find the hidden companion cube in co-op test chamber
25 ✓ March 31st, 2013
Narbacular Drop
Place a portal under your co-op partner while they are gesturing
25 ✓ March 31st, 2013
Four Ring Circus
Enter 4 different portals without touching the ground in co-op
25 ✓ March 31st, 2013
The Part Where He Kills You
This is that part
20 ✓ March 30th, 2013
Lunacy
That just happened
20 ✓ March 30th, 2013
Drop Box
Place a cube on a button without touching the cube
20 ✓ March 27th, 2013
Preservation of Mass
Break the rules in Test Chamber 07
20 ✓ March 27th, 2013
Final Transmission
Find the hidden signal in one of the Rat Man's dens
20 ✓ March 27th, 2013
Schrodinger's Catch
Catch a blue-painted box before it touches the ground
20 ✓ March 30th, 2013
Door Prize
Examine all the vitrified test chamber doors
20 ✓ March 29th, 2013
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
20 ✓ March 31st, 2013
Air Show
Perform 2 aerial gestures before touching the ground in co-op
20 ✓ March 31st, 2013
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
20 ✓ March 31st, 2013
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row
20 ✓ March 31st, 2013
White Out
Complete the first Conversion Gel test
15 ✓ March 29th, 2013
Tunnel of Funnel
Master the Excursion Funnel
15 ✓ March 30th, 2013
Dual Pit Experiment
Do the same test twice
15 ✓ March 29th, 2013
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
15 ✓ March 31st, 2013
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
15 ✓ March 31st, 2013
Gesticul-8
Perform all 8 gestures of your own volition in co-op
15 ✓ March 31st, 2013
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
15 ✓ March 31st, 2013
Still Alive
Complete Course 4 with neither you nor your co-op partner dying
15 ✓ April 1st, 2013
Stalemate Associate
Press the button!
15 ✓ March 28th, 2013
Tater Tote
Carry science forward
15 ✓ March 29th, 2013
Vertically Unchallenged
Master the Repulsion Gel
15 ✓ March 29th, 2013
Stranger Than Friction
Master the Propulsion Gel
15 ✓ March 29th, 2013
No Hard Feelings
Save a turret from redemption
10 ✓ March 28th, 2013
Ship Overboard
Discover the missing experiment
10 ✓ March 29th, 2013
Portrait of a Lady
Find a hidden portrait
10 ✓ March 29th, 2013
You Made Your Point
Refuse to solve the first test in Chapter 8
10 ✓ March 29th, 2013
Undiscouraged
Complete the first Thermal Discouragement Beam test
10 ✓ March 27th, 2013
Team Building
Complete all test chambers in the Team Building co-op course
10 ✓ March 31st, 2013
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
10 ✓ March 31st, 2013
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op
10 ✓ March 31st, 2013
Bridge Over Troubling Water
Complete the first Hard Light Bridge test
10 ✓ March 27th, 2013
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
10 ✓ April 1st, 2013
SaBOTour
Make a break for it
10 ✓ March 28th, 2013
Wake Up Call
Survive the manual override
5 ✓ March 27th, 2013
Pturretdactyl
Use an Aerial Faith Plate to launch a turret
5 ✓ March 27th, 2013
You Monster
Reunite with GLaDOS
5 ✓ March 27th, 2013
Good Listener
Take GLaDOS' escape advice
5 ✓ March 28th, 2013
Scanned Alone
Stand in a defective turret detector
5 ✓ March 28th, 2013
High Five
Celebrate your cooperative calibration success
5 ✓ March 31st, 2013