Achievement Unlocked Visibility Global Unlocks
Smash TV
Break 11 test chamber monitors 		2016-10-26 20:00:52 3.7%
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list 		2016-10-26 19:27:16 4.4%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements 		2016-10-26 14:38:49 2.7%
Still Alive
Complete Course 4 with neither you nor your co-op partner dying 		2016-10-26 14:28:54 2.4%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before 		2016-10-25 14:19:45 5.8%
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them 		2016-10-19 19:19:58 4.6%
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course 		2016-10-19 19:16:45 2.6%
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each 		2016-10-19 19:07:36 3.0%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course 		2016-10-19 18:57:53 3.6%
Narbacular Drop
Place a portal under your co-op partner while they are gesturing 		2016-10-19 17:55:44 5.9%
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row 		2016-10-19 17:55:03 9.9%
Door Prize
Examine all the vitrified test chamber doors 		2016-10-19 17:39:01 7.5%
Ship Overboard
Discover the missing experiment 		2016-10-19 17:20:14 11.0%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op 		2016-10-17 19:53:08 6.9%
Scanned Alone
Stand in a defective turret detector 		2016-10-17 17:16:18 35.9%
Lunacy
That just happened 		2016-10-16 18:27:30 35.3%
Pit Boss
Show that pit who's boss 		2016-10-16 18:08:35 8.0%
The Part Where He Kills You
This is that part 		2016-10-16 18:07:47 35.6%
Tunnel of Funnel
Master the Excursion Funnel 		2016-10-16 18:00:20 36.4%
You Saved Science
Complete all test chambers in all courses of co-op 		2016-10-15 23:21:52 21.3%
Gesticul-8
Perform all 8 gestures of your own volition in co-op 		2016-10-15 22:26:53 27.3%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses 		2016-10-15 22:20:26 9.1%
Air Show
Perform 2 aerial gestures before touching the ground in co-op 		2016-10-15 21:32:18 33.9%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course 		2015-01-18 20:59:23 26.4%
Party of Three
Find the hidden companion cube in co-op test chamber 		2015-01-18 20:50:36 3.6%
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course 		2015-01-18 20:16:21 32.2%
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op 		2015-01-18 20:03:26 10.0%
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course 		2015-01-18 19:48:09 41.1%
Dual Pit Experiment
Do the same test twice 		2015-01-16 20:29:20 38.3%
You Made Your Point
Refuse to solve the first test in Chapter 8 		2015-01-16 20:27:01 6.8%
White Out
Complete the first Conversion Gel test 		2015-01-16 20:01:49 39.7%
Stranger Than Friction
Master the Propulsion Gel 		2015-01-16 19:51:00 40.8%
Portrait of a Lady
Find a hidden portrait 		2015-01-16 19:41:48 12.1%
Schrodinger's Catch
Catch a blue-painted box before it touches the ground 		2015-01-16 19:33:15 7.0%
Good Listener
Take GLaDOS' escape advice 		2015-01-16 19:01:23 29.3%
Overclocker
Complete Test Chamber 10 in 70 seconds 		2015-01-05 21:06:51 4.0%
Tater Tote
Carry science forward 		2014-09-19 13:02:31 42.5%
Final Transmission
Find the hidden signal in one of the Rat Man's dens 		2014-09-18 14:45:08 5.7%
Preservation of Mass
Break the rules in Test Chamber 07 		2014-09-11 12:45:39 25.1%
Pturretdactyl
Use an Aerial Faith Plate to launch a turret 		2014-08-28 08:40:03 9.1%
Team Building
Complete all test chambers in the Team Building co-op course 		2014-08-28 08:07:49 49.6%
High Five
Celebrate your cooperative calibration success 		2014-08-28 07:52:35 58.8%
Vertically Unchallenged
Master the Repulsion Gel 		2014-08-27 21:45:46 44.4%
Stalemate Associate
Press the button! 		2014-08-27 21:25:47 47.2%
No Hard Feelings
Save a turret from redemption 		2014-08-27 21:13:58 31.9%
SaBOTour
Make a break for it 		2014-08-27 21:04:48 48.2%
Bridge Over Troubling Water
Complete the first Hard Light Bridge test 		2014-08-27 19:56:05 55.1%
Undiscouraged
Complete the first Thermal Discouragement Beam test 		2014-08-27 19:33:07 64.6%
You Monster
Reunite with GLaDOS 		2014-08-27 19:27:40 66.7%
Wake Up Call
Survive the manual override 		2014-08-27 19:12:45 75.9%
Drop Box
Place a cube on a button without touching the cube 		2014-08-27 18:09:18 29.7%