Achievement Unlocked Visibility Global Unlocks
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before 		2021-07-30 02:47:13 5.8%
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course 		2021-07-30 02:27:33 2.6%
You Saved Science
Complete all test chambers in all courses of co-op 		2021-07-29 05:06:02 21.3%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses 		2021-07-29 03:49:13 9.1%
Still Alive
Complete Course 4 with neither you nor your co-op partner dying 		2021-07-29 03:39:36 2.4%
Party of Three
Find the hidden companion cube in co-op test chamber 		2021-07-26 03:43:57 3.6%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course 		2021-07-26 03:31:53 26.4%
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list 		2021-07-22 02:14:46 4.4%
Gesticul-8
Perform all 8 gestures of your own volition in co-op 		2019-01-14 03:51:26 27.3%
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course 		2015-01-25 06:02:47 32.2%
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op 		2015-01-25 05:38:50 10.0%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements 		2015-01-18 23:01:09 2.7%
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them 		2015-01-18 22:12:55 4.6%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course 		2015-01-18 21:26:06 3.6%
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each 		2015-01-18 21:08:07 3.0%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op 		2015-01-18 19:41:12 6.9%
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course 		2014-05-11 23:49:37 41.1%
Overclocker
Complete Test Chamber 10 in 70 seconds 		2013-02-02 03:43:54 4.0%
Smash TV
Break 11 test chamber monitors 		2013-02-02 02:57:06 3.7%
Portrait of a Lady
Find a hidden portrait 		2013-02-01 22:50:18 12.1%
Narbacular Drop
Place a portal under your co-op partner while they are gesturing 		2013-01-31 20:24:19 5.9%
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row 		2013-01-31 20:20:47 9.9%
Air Show
Perform 2 aerial gestures before touching the ground in co-op 		2013-01-31 20:06:18 33.9%
Team Building
Complete all test chambers in the Team Building co-op course 		2013-01-31 19:59:30 49.6%
Ship Overboard
Discover the missing experiment 		2013-01-12 08:15:31 11.0%
Door Prize
Examine all the vitrified test chamber doors 		2013-01-12 08:15:15 7.5%
Schrodinger's Catch
Catch a blue-painted box before it touches the ground 		2013-01-12 08:04:21 7.0%
Pit Boss
Show that pit who's boss 		2013-01-12 05:51:14 8.0%
You Made Your Point
Refuse to solve the first test in Chapter 8 		2013-01-12 05:16:16 6.8%
Final Transmission
Find the hidden signal in one of the Rat Man's dens 		2013-01-12 04:49:16 5.7%
Drop Box
Place a cube on a button without touching the cube 		2013-01-12 04:42:24 29.7%
Pturretdactyl
Use an Aerial Faith Plate to launch a turret 		2013-01-12 04:41:17 9.1%
Good Listener
Take GLaDOS' escape advice 		2013-01-12 03:30:25 29.3%
Lunacy
That just happened 		2013-01-12 02:38:26 35.3%
The Part Where He Kills You
This is that part 		2013-01-11 23:41:14 35.6%
Tunnel of Funnel
Master the Excursion Funnel 		2013-01-11 23:38:12 36.3%
Dual Pit Experiment
Do the same test twice 		2013-01-11 19:09:08 38.3%
White Out
Complete the first Conversion Gel test 		2013-01-09 20:38:27 39.7%
Stranger Than Friction
Master the Propulsion Gel 		2013-01-09 19:18:34 40.8%
Tater Tote
Carry science forward 		2013-01-08 18:18:23 42.4%
Vertically Unchallenged
Master the Repulsion Gel 		2013-01-08 17:28:15 44.4%
Stalemate Associate
Press the button! 		2013-01-08 06:38:26 47.1%
Scanned Alone
Stand in a defective turret detector 		2013-01-08 06:11:27 35.8%
No Hard Feelings
Save a turret from redemption 		2013-01-08 06:06:06 31.9%
SaBOTour
Make a break for it 		2013-01-08 05:19:37 48.1%
Bridge Over Troubling Water
Complete the first Hard Light Bridge test 		2013-01-07 21:52:17 55.1%
Preservation of Mass
Break the rules in Test Chamber 07 		2013-01-07 19:48:09 25.1%
Undiscouraged
Complete the first Thermal Discouragement Beam test 		2013-01-07 19:10:49 64.6%
You Monster
Reunite with GLaDOS 		2013-01-07 19:03:06 66.6%
Wake Up Call
Survive the manual override 		2013-01-07 18:21:21 75.9%
High Five
Celebrate your cooperative calibration success 		2013-01-03 07:23:30 58.8%