Unlocked: Apr 23, 2011 7:09am
Wake Up Call
Survive the manual override
Unlocked: Apr 23, 2011 5:52pm
You Monster
Reunite with GLaDOS
Unlocked: Apr 23, 2011 6:01pm
Undiscouraged
Complete the first Thermal Discouragement Beam test
Unlocked: Apr 23, 2011 7:52pm
Bridge Over Troubling Water
Complete the first Hard Light Bridge test
Unlocked: Apr 23, 2011 10:07pm
SaBOTour
Make a break for it
Unlocked: Apr 23, 2011 10:54pm
Stalemate Associate
Press the button!
Unlocked: Apr 24, 2011 6:38pm
Vertically Unchallenged
Master the Repulsion Gel
Unlocked: May 16, 2011 8:45am
Stranger Than Friction
Master the Propulsion Gel
Unlocked: May 16, 2011 9:12am
White Out
Complete the first Conversion Gel test
Unlocked: Apr 27, 2011 12:30pm
Tunnel of Funnel
Master the Excursion Funnel
Unlocked: May 16, 2011 9:57am
Dual Pit Experiment
Do the same test twice
Unlocked: May 16, 2011 11:28am
The Part Where He Kills You
This is that part
Unlocked: May 16, 2011 12:13pm
Lunacy
That just happened
Unlocked: Jul 17, 2012 10:26am
Drop Box
Place a cube on a button without touching the cube
Unlocked: Apr 23, 2011 10:08pm
Good Listener
Take GLaDOS' escape advice
Unlocked: Apr 23, 2011 10:32pm
Scanned Alone
Stand in a defective turret detector
Unlocked: Apr 23, 2011 10:26pm
No Hard Feelings
Save a turret from redemption
Unlocked: Apr 24, 2011 9:56pm
High Five
Celebrate your cooperative calibration success
Unlocked: Apr 24, 2011 10:36pm
Team Building
Complete all test chambers in the Team Building co-op course
Unlocked: Apr 26, 2011 10:22pm
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
Unlocked: Apr 27, 2011 9:43pm
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
Unlocked: May 12, 2011 10:33pm
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course
Unlocked: May 17, 2011 9:41pm
You Saved Science
Complete all test chambers in all courses of co-op
Unlocked: Apr 28, 2011 9:31pm
Gesticul-8
Perform all 8 gestures of your own volition in co-op
Unlocked: May 12, 2011 10:32pm
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op
Unlocked: Jul 18, 2012 5:51pm
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
Unlocked: Apr 26, 2011 9:09pm
Air Show
Perform 2 aerial gestures before touching the ground in co-op
Unlocked: May 12, 2011 10:50pm
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
Tater Tote
Carry science forward
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
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
Portrait of a Lady
Find a hidden portrait
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
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
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course
