Achievement Unlocked Visibility Global Unlocks
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list 		2018-08-01 01:01:00 4.4%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before 		2018-07-31 21:30:10 5.8%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses 		2018-07-22 06:02:34 9.1%
Still Alive
Complete Course 4 with neither you nor your co-op partner dying 		2018-03-18 20:01:21 2.4%
Smash TV
Break 11 test chamber monitors 		2018-03-03 07:34:31 3.7%
You Made Your Point
Refuse to solve the first test in Chapter 8 		2018-03-03 06:10:39 6.8%
Pit Boss
Show that pit who's boss 		2018-03-03 06:04:04 8.0%
Portrait of a Lady
Find a hidden portrait 		2018-03-03 06:00:12 12.1%
Talent Show
Never lose a cube in Chamber 6 of the Mobility Gels co-op course 		2018-01-21 18:11:19 2.6%
Party of Three
Find the hidden companion cube in co-op test chamber 		2018-01-21 17:55:33 3.6%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements 		2018-01-21 17:38:54 2.7%
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them 		2018-01-21 17:21:39 4.6%
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op 		2018-01-21 17:17:57 10.0%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course 		2018-01-21 17:05:53 3.6%
Narbacular Drop
Place a portal under your co-op partner while they are gesturing 		2018-01-21 16:49:17 5.9%
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each 		2017-10-31 21:25:10 3.0%
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row 		2017-10-31 20:50:01 9.9%
Schrodinger's Catch
Catch a blue-painted box before it touches the ground 		2017-10-31 20:26:19 7.0%
Door Prize
Examine all the vitrified test chamber doors 		2017-10-31 19:55:51 7.5%
Overclocker
Complete Test Chamber 10 in 70 seconds 		2017-10-31 19:19:28 4.0%
Preservation of Mass
Break the rules in Test Chamber 07 		2017-10-31 19:03:09 25.1%
Final Transmission
Find the hidden signal in one of the Rat Man's dens 		2017-10-31 18:57:15 5.7%
Drop Box
Place a cube on a button without touching the cube 		2017-10-31 18:55:34 29.7%
Lunacy
That just happened 		2017-10-15 02:23:13 35.3%
The Part Where He Kills You
This is that part 		2017-10-15 01:53:00 35.6%
Tunnel of Funnel
Master the Excursion Funnel 		2017-10-15 01:40:22 36.4%
Dual Pit Experiment
Do the same test twice 		2017-10-15 00:27:28 38.3%
You Saved Science
Complete all test chambers in all courses of co-op 		2017-07-18 12:17:48 21.3%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op 		2017-07-18 11:03:17 6.9%
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course 		2017-07-18 09:49:44 26.4%
Gesticul-8
Perform all 8 gestures of your own volition in co-op 		2017-07-18 09:05:09 27.3%
Air Show
Perform 2 aerial gestures before touching the ground in co-op 		2017-07-16 20:42:45 33.9%
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course 		2017-07-16 20:36:14 32.2%
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course 		2017-07-16 19:12:34 41.1%
Team Building
Complete all test chambers in the Team Building co-op course 		2017-07-16 18:19:31 49.6%
High Five
Celebrate your cooperative calibration success 		2017-07-16 18:01:47 58.8%
White Out
Complete the first Conversion Gel test 		2017-07-07 21:07:18 39.7%
Stranger Than Friction
Master the Propulsion Gel 		2017-07-07 20:46:34 40.8%
Tater Tote
Carry science forward 		2017-07-07 20:22:28 42.5%
Ship Overboard
Discover the missing experiment 		2017-07-07 20:20:00 11.0%
Vertically Unchallenged
Master the Repulsion Gel 		2017-07-07 19:56:26 44.4%
Stalemate Associate
Press the button! 		2017-07-07 19:02:50 47.2%
Scanned Alone
Stand in a defective turret detector 		2017-07-07 18:48:19 35.9%
No Hard Feelings
Save a turret from redemption 		2017-07-07 18:46:05 31.9%
Good Listener
Take GLaDOS' escape advice 		2017-07-07 18:37:25 29.3%
SaBOTour
Make a break for it 		2017-07-07 18:36:51 48.2%
Pturretdactyl
Use an Aerial Faith Plate to launch a turret 		2017-07-02 18:03:01 9.1%
Bridge Over Troubling Water
Complete the first Hard Light Bridge test 		2017-07-02 17:45:42 55.1%
Undiscouraged
Complete the first Thermal Discouragement Beam test 		2017-07-02 17:14:43 64.6%
You Monster
Reunite with GLaDOS 		2017-07-02 17:09:58 66.7%
Wake Up Call
Survive the manual override 		2017-07-02 16:49:14 75.9%