Achievement Unlocked Visibility Global Unlocks
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list 		2021-06-29 19:40:29 4.4%
Still Alive
Complete Course 4 with neither you nor your co-op partner dying 		2021-06-05 16:10:49 2.3%
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each 		2021-02-26 19:07:18 3.0%
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course 		2021-02-26 18:55:24 2.6%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course 		2021-02-26 17:46:48 3.6%
Party of Three
Find the hidden companion cube in co-op test chamber 		2020-11-21 16:19:31 3.6%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements 		2020-11-13 16:00:38 2.7%
Narbacular Drop
Place a portal under your co-op partner while they are gesturing 		2020-11-13 15:16:19 5.9%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses 		2014-11-26 20:41:29 9.1%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before 		2014-11-26 20:38:48 5.8%
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them 		2014-11-24 20:59:39 4.6%
You Saved Science
Complete all test chambers in all courses of co-op 		2014-07-10 20:05:35 21.3%
Portrait of a Lady
Find a hidden portrait 		2014-07-09 15:56:02 12.1%
Smash TV
Break 11 test chamber monitors 		2014-07-09 15:13:47 3.7%
Pit Boss
Show that pit who's boss 		2014-07-09 15:13:47 8.0%
You Made Your Point
Refuse to solve the first test in Chapter 8 		2014-07-08 15:34:29 6.8%
Ship Overboard
Discover the missing experiment 		2014-07-07 18:06:44 11.0%
Door Prize
Examine all the vitrified test chamber doors 		2014-07-07 18:06:40 7.5%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course 		2014-07-07 17:56:35 26.4%
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op 		2014-07-07 17:52:22 10.0%
Schrodinger's Catch
Catch a blue-painted box before it touches the ground 		2014-07-07 17:37:12 7.0%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op 		2014-07-06 15:01:46 6.9%
Gesticul-8
Perform all 8 gestures of your own volition in co-op 		2014-07-06 14:50:33 27.3%
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course 		2014-07-06 14:23:14 32.2%
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row 		2014-07-06 14:16:09 9.9%
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course 		2014-07-06 13:20:50 41.1%
Air Show
Perform 2 aerial gestures before touching the ground in co-op 		2014-07-06 12:39:53 33.9%
Team Building
Complete all test chambers in the Team Building co-op course 		2014-07-06 12:36:13 49.6%
High Five
Celebrate your cooperative calibration success 		2014-07-06 10:06:02 58.8%
Overclocker
Complete Test Chamber 10 in 70 seconds 		2013-09-05 18:14:28 4.0%
Final Transmission
Find the hidden signal in one of the Rat Man's dens 		2013-08-31 11:22:15 5.7%
Pturretdactyl
Use an Aerial Faith Plate to launch a turret 		2013-08-31 11:22:15 9.1%
Preservation of Mass
Break the rules in Test Chamber 07 		2013-08-30 16:22:50 25.2%
Lunacy
That just happened 		2013-08-30 15:40:52 35.3%
The Part Where He Kills You
This is that part 		2013-08-30 15:06:14 35.6%
Tunnel of Funnel
Master the Excursion Funnel 		2013-08-30 14:48:12 36.4%
Dual Pit Experiment
Do the same test twice 		2013-08-30 14:07:11 38.3%
White Out
Complete the first Conversion Gel test 		2013-08-30 13:08:50 39.7%
Stranger Than Friction
Master the Propulsion Gel 		2013-08-30 12:52:19 40.9%
Tater Tote
Carry science forward 		2013-08-30 12:52:19 42.5%
Vertically Unchallenged
Master the Repulsion Gel 		2013-08-29 12:12:55 44.5%
Stalemate Associate
Press the button! 		2013-08-29 11:16:20 47.2%
Scanned Alone
Stand in a defective turret detector 		2013-08-29 11:02:19 35.9%
No Hard Feelings
Save a turret from redemption 		2013-08-29 10:57:42 31.9%
Good Listener
Take GLaDOS' escape advice 		2013-08-29 10:47:31 29.4%
SaBOTour
Make a break for it 		2013-08-29 10:46:58 48.2%
Bridge Over Troubling Water
Complete the first Hard Light Bridge test 		2013-08-29 09:04:52 55.2%
Undiscouraged
Complete the first Thermal Discouragement Beam test 		2013-08-29 08:39:27 64.7%
You Monster
Reunite with GLaDOS 		2013-07-27 11:29:36 66.7%
Wake Up Call
Survive the manual override 		2013-07-27 11:11:15 76.0%
Drop Box
Place a cube on a button without touching the cube 		2013-07-26 10:51:53 29.7%