Achievement Unlocked Visibility Global Unlocks
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each 		2021-12-05 15:45:00 3.0%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements 		2021-12-05 15:32:09 2.7%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course 		2021-12-05 15:22:22 3.6%
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course 		2021-12-05 13:58:19 2.6%
Still Alive
Complete Course 4 with neither you nor your co-op partner dying 		2021-12-05 13:19:13 2.4%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op 		2021-12-05 01:15:10 6.9%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before 		2021-12-04 15:41:15 5.8%
Overclocker
Complete Test Chamber 10 in 70 seconds 		2021-10-30 16:13:39 4.0%
Pit Boss
Show that pit who's boss 		2021-10-29 22:21:28 8.0%
Smash TV
Break 11 test chamber monitors 		2021-10-29 22:16:26 3.7%
You Made Your Point
Refuse to solve the first test in Chapter 8 		2021-10-29 21:15:35 6.8%
Portrait of a Lady
Find a hidden portrait 		2021-10-29 20:32:07 12.1%
Schrodinger's Catch
Catch a blue-painted box before it touches the ground 		2021-10-29 20:12:31 7.0%
You Saved Science
Complete all test chambers in all courses of co-op 		2014-11-22 23:10:05 21.3%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses 		2014-11-14 12:37:49 9.1%
Party of Three
Find the hidden companion cube in co-op test chamber 		2014-10-04 13:06:36 3.6%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course 		2014-10-04 12:13:12 26.5%
Gesticul-8
Perform all 8 gestures of your own volition in co-op 		2014-10-04 10:56:03 27.3%
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course 		2014-10-04 09:57:45 32.2%
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op 		2014-10-04 09:27:20 10.0%
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them 		2014-10-03 20:34:39 4.6%
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course 		2014-10-03 20:27:18 41.1%
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row 		2014-10-03 19:58:27 9.9%
Air Show
Perform 2 aerial gestures before touching the ground in co-op 		2014-10-03 19:30:52 33.9%
Narbacular Drop
Place a portal under your co-op partner while they are gesturing 		2014-10-03 19:21:48 5.9%
Team Building
Complete all test chambers in the Team Building co-op course 		2014-10-03 19:18:38 49.6%
High Five
Celebrate your cooperative calibration success 		2014-10-03 18:32:22 58.8%
Ship Overboard
Discover the missing experiment 		2014-10-03 11:24:05 11.0%
Door Prize
Examine all the vitrified test chamber doors 		2014-10-03 11:23:48 7.5%
Good Listener
Take GLaDOS' escape advice 		2014-10-03 11:13:52 29.3%
Pturretdactyl
Use an Aerial Faith Plate to launch a turret 		2014-10-03 11:08:05 9.1%
Preservation of Mass
Break the rules in Test Chamber 07 		2014-10-03 10:57:50 25.1%
Drop Box
Place a cube on a button without touching the cube 		2014-10-03 10:53:22 29.7%
Final Transmission
Find the hidden signal in one of the Rat Man's dens 		2014-10-03 10:50:50 5.7%
Lunacy
That just happened 		2014-10-03 10:29:41 35.3%
The Part Where He Kills You
This is that part 		2014-10-03 09:53:16 35.6%
Tunnel of Funnel
Master the Excursion Funnel 		2014-10-03 09:43:43 36.3%
Dual Pit Experiment
Do the same test twice 		2014-10-03 08:53:19 38.3%
White Out
Complete the first Conversion Gel test 		2014-10-03 08:19:17 39.6%
Stranger Than Friction
Master the Propulsion Gel 		2014-10-02 16:32:42 40.8%
Tater Tote
Carry science forward 		2014-10-02 16:06:32 42.4%
Vertically Unchallenged
Master the Repulsion Gel 		2014-10-02 15:25:40 44.4%
Stalemate Associate
Press the button! 		2014-10-02 14:06:36 47.1%
Scanned Alone
Stand in a defective turret detector 		2014-10-02 13:46:51 35.8%
No Hard Feelings
Save a turret from redemption 		2014-10-02 13:40:33 31.9%
SaBOTour
Make a break for it 		2014-10-02 13:26:52 48.1%
Bridge Over Troubling Water
Complete the first Hard Light Bridge test 		2014-10-01 15:01:21 55.1%
Undiscouraged
Complete the first Thermal Discouragement Beam test 		2014-10-01 14:13:13 64.6%
You Monster
Reunite with GLaDOS 		2014-09-30 16:37:12 66.6%
Wake Up Call
Survive the manual override 		2014-09-30 16:11:09 75.9%
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list 		4.4%