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