Wake Up Call
Objective: Survive the manual override
You Monster
Objective: Reunite with GLaDOS
Undiscouraged
Objective: Complete the first Thermal Discouragement Beam test
Bridge Over Troubling Water
Objective: Complete the first Hard Light Bridge test
SaBOTour
Objective: Make a break for it
Stalemate Associate
Objective: Press the button!
Vertically Unchallenged
Objective: Master the Repulsion Gel
Tater Tote
Objective: Carry science forward
Stranger Than Friction
Objective: Master the Propulsion Gel
White Out
Objective: Complete the first Conversion Gel test
Dual Pit Experiment
Objective: Do the same test twice
Tunnel of Funnel
Objective: Master the Excursion Funnel
The Part Where He Kills You
Objective: This is that part
Lunacy
Objective: That just happened
Scanned Alone
Objective: Stand in a defective turret detector
High Five
Objective: Celebrate your cooperative calibration success
Team Building
Objective: Complete all test chambers in the Team Building co-op course
No Hard Feelings
Objective: Save a turret from redemption
Preservation of Mass
Objective: Break the rules in Test Chamber 07
Good Listener
Objective: Take GLaDOS' escape advice
Confidence Building
Objective: Complete all test chambers in the Mass and Velocity co-op course
Bridge Building
Objective: Complete all test chambers in the Hard-Light Surfaces co-op course
Drop Box
Objective: Place a cube on a button without touching the cube
Air Show
Objective: Perform 2 aerial gestures before touching the ground in co-op
Gesticul-8
Objective: Perform all 8 gestures of your own volition in co-op
Obstacle Building
Objective: Complete all test chambers in the Excursion Funnels co-op course
You Saved Science
Objective: Complete all test chambers in all courses of co-op
Portrait of a Lady
Objective: Find a hidden portrait
Ship Overboard
Objective: Discover the missing experiment
Can't Touch This
Objective: Dance in front of a turret blocked by a hard light bridge in co-op
You Made Your Point
Objective: Refuse to solve the first test in Chapter 8
Door Prize
Objective: Examine all the vitrified test chamber doors
Rock Portal Scissors
Objective: Win 3 co-op games of rock-paper-scissors in a row
Asking for Trouble
Objective: Taunt GLaDOS in front of a camera in each of the five co-op courses
Pturretdactyl
Objective: Use an Aerial Faith Plate to launch a turret
Pit Boss
Objective: Show that pit who's boss
Narbacular Drop
Objective: Place a portal under your co-op partner while they are gesturing
Final Transmission
Objective: Find the hidden signal in one of the Rat Man's dens
Schrodinger's Catch
Objective: Catch a blue-painted box before it touches the ground
Empty Gesture
Objective: Drop your co-op partner in goo while they are gesturing by removing the bridge under them
Overclocker
Objective: Complete Test Chamber 10 in 70 seconds
Four Ring Circus
Objective: Enter 4 different portals without touching the ground in co-op
Party of Three
Objective: Find the hidden companion cube in co-op test chamber
Smash TV
Objective: Break 11 test chamber monitors
Iron Grip
Objective: Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
Portal Conservation Society
Objective: Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
Triple Crown
Objective: Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
Professor Portal
Objective: After completing co-op, complete Calibration Course online with a friend who hasn’t played before
Friends List With Benefits
Objective: While playing co-op, hug 3 different people on your friends list
Still Alive
Objective: Complete Course 4 with neither you nor your co-op partner dying
Taurusplopp on Nov 27
Jaks on Aug 19
Bernardgamer on Feb 21
Degari on Dec 22
KilieSo on Oct 07
AdmiralThrawn on Apr 14
orubun on Apr 30
Mistereveready on Apr 21