Unlocked: Apr 19, 2011 5:12am
Wake Up Call
Survive the manual override
Unlocked: Apr 19, 2011 5:32am
You Monster
Reunite with GLaDOS
Unlocked: Apr 19, 2011 7:11am
Undiscouraged
Complete the first Thermal Discouragement Beam test
Unlocked: Apr 19, 2011 7:47am
Bridge Over Troubling Water
Complete the first Hard Light Bridge test
Unlocked: Apr 19, 2011 8:34am
SaBOTour
Make a break for it
Unlocked: Apr 19, 2011 9:00am
Stalemate Associate
Press the button!
Unlocked: Apr 19, 2011 10:17am
Tater Tote
Carry science forward
Unlocked: Apr 19, 2011 9:43am
Vertically Unchallenged
Master the Repulsion Gel
Unlocked: Apr 20, 2011 8:31am
Stranger Than Friction
Master the Propulsion Gel
Unlocked: Apr 20, 2011 9:20am
White Out
Complete the first Conversion Gel test
Unlocked: Apr 20, 2011 10:45am
Tunnel of Funnel
Master the Excursion Funnel
Unlocked: Apr 20, 2011 9:46am
Dual Pit Experiment
Do the same test twice
Unlocked: Apr 22, 2011 1:40pm
The Part Where He Kills You
This is that part
Unlocked: Apr 22, 2011 2:08pm
Lunacy
That just happened
Unlocked: Apr 19, 2011 7:32am
Preservation of Mass
Break the rules in Test Chamber 07
Unlocked: Apr 28, 2011 10:28am
Good Listener
Take GLaDOS' escape advice
Unlocked: Apr 19, 2011 8:45am
Scanned Alone
Stand in a defective turret detector
Unlocked: Apr 20, 2011 8:31am
Portrait of a Lady
Find a hidden portrait
Unlocked: Apr 19, 2011 11:27am
High Five
Celebrate your cooperative calibration success
Unlocked: Apr 19, 2011 11:50am
Team Building
Complete all test chambers in the Team Building co-op course
Unlocked: Apr 19, 2011 1:00pm
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
Unlocked: Apr 24, 2011 6:58am
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
Unlocked: Apr 24, 2011 8:14am
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
Unlocked: May 27, 2012 11:17am
You Saved Science
Complete all test chambers in all courses of co-op
Unlocked: Apr 24, 2011 7:23am
Gesticul-8
Perform all 8 gestures of your own volition in co-op
Unlocked: Apr 20, 2011 1:34pm
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op
Unlocked: Apr 24, 2011 5:32am
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
Unlocked: Apr 23, 2011 2:59am
Narbacular Drop
Place a portal under your co-op partner while they are gesturing
Unlocked: Jan 20, 2013 4:41am
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
Unlocked: Apr 19, 2011 12:21pm
Air Show
Perform 2 aerial gestures before touching the ground in co-op
Unlocked: Apr 24, 2011 8:42am
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
Unlocked: Apr 19, 2011 12:45pm
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row
Unlocked: Jan 20, 2013 4:42am
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list
Drop Box
Place a cube on a button without touching the cube
Overclocker
Complete Test Chamber 10 in 70 seconds
Pit Boss
Show that pit who's boss
Pturretdactyl
Use an Aerial Faith Plate to launch a turret
Final Transmission
Find the hidden signal in one of the Rat Man's dens
No Hard Feelings
Save a turret from redemption
Schrodinger's Catch
Catch a blue-painted box before it touches the ground
Ship Overboard
Discover the missing experiment
Door Prize
Examine all the vitrified test chamber doors
You Made Your Point
Refuse to solve the first test in Chapter 8
Smash TV
Break 11 test chamber monitors
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
Party of Three
Find the hidden companion cube in co-op test chamber
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
Four Ring Circus
Enter 4 different portals without touching the ground in co-op
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
Still Alive
Complete Course 4 with neither you nor your co-op partner dying
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course
