Unlocked: Apr 18, 2011 10:26pm
Wake Up Call
Survive the manual override
Unlocked: Apr 19, 2011 11:36am
You Monster
Reunite with GLaDOS
Unlocked: Apr 19, 2011 11:41am
Undiscouraged
Complete the first Thermal Discouragement Beam test
Unlocked: Apr 19, 2011 8:10pm
Bridge Over Troubling Water
Complete the first Hard Light Bridge test
Unlocked: Apr 21, 2011 12:23am
SaBOTour
Make a break for it
Unlocked: Apr 21, 2011 12:52am
Stalemate Associate
Press the button!
Unlocked: Apr 22, 2011 11:30am
Tater Tote
Carry science forward
Unlocked: Apr 21, 2011 11:21am
Vertically Unchallenged
Master the Repulsion Gel
Unlocked: Apr 22, 2011 10:11pm
Stranger Than Friction
Master the Propulsion Gel
Unlocked: Apr 22, 2011 10:30pm
White Out
Complete the first Conversion Gel test
Unlocked: Apr 23, 2011 12:20am
Tunnel of Funnel
Master the Excursion Funnel
Unlocked: Apr 22, 2011 11:27pm
Dual Pit Experiment
Do the same test twice
Unlocked: Apr 23, 2011 7:45pm
The Part Where He Kills You
This is that part
Unlocked: Apr 23, 2011 8:23pm
Lunacy
That just happened
Unlocked: May 8, 2012 2:40pm
Drop Box
Place a cube on a button without touching the cube
Unlocked: Apr 21, 2011 12:36am
Scanned Alone
Stand in a defective turret detector
Unlocked: Apr 22, 2011 11:42am
Portrait of a Lady
Find a hidden portrait
Unlocked: Apr 23, 2011 8:37pm
High Five
Celebrate your cooperative calibration success
Unlocked: Apr 23, 2011 8:57pm
Team Building
Complete all test chambers in the Team Building co-op course
Unlocked: Apr 24, 2011 10:32am
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
Unlocked: Apr 27, 2011 9:03pm
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
Unlocked: May 4, 2011 1:14pm
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
Unlocked: May 4, 2011 2:28pm
You Saved Science
Complete all test chambers in all courses of co-op
Unlocked: Apr 27, 2011 9:41pm
Gesticul-8
Perform all 8 gestures of your own volition in co-op
Unlocked: Nov 19, 2012 5:49pm
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
Unlocked: Apr 27, 2011 9:39pm
Air Show
Perform 2 aerial gestures before touching the ground in co-op
Unlocked: Nov 19, 2012 6:11pm
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
Unlocked: Jul 10, 2011 9:24am
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course
Overclocker
Complete Test Chamber 10 in 70 seconds
Pit Boss
Show that pit who's boss
Preservation of Mass
Break the rules in Test Chamber 07
Pturretdactyl
Use an Aerial Faith Plate to launch a turret
Final Transmission
Find the hidden signal in one of the Rat Man's dens
Good Listener
Take GLaDOS' escape advice
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
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
Party of Three
Find the hidden companion cube in co-op test chamber
Narbacular Drop
Place a portal under your co-op partner while they are gesturing
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
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list
