Schrodinger's Catch
Catch a blue-painted box before it touches the ground
1/1/2025
9:54:12 PM
Very Rare 6.9%
Final Transmission
Find the hidden signal in one of the Rat Man's dens
1/1/2025
8:33:46 PM
Very Rare 7.7%
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
1/1/2025
8:05:42 PM
Ultra Rare 1.8%
Still Alive
Complete Course 4 with neither you nor your co-op partner dying
1/1/2025
7:48:46 PM
Ultra Rare 1.4%
Can't Touch This
Dance in front of a turret blocked by a hard light bridge in co-op
1/1/2025
2:31:06 AM
Very Rare 7.9%
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
1/1/2025
2:08:53 AM
Ultra Rare 2.1%
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses
1/1/2025
1:00:24 AM
Very Rare 6.0%
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
1/1/2025
12:59:32 AM
Ultra Rare 3.9%
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
1/1/2025
12:52:49 AM
Ultra Rare 2.8%
Four Ring Circus
Enter 4 different portals without touching the ground in co-op
1/1/2025
12:34:25 AM
Ultra Rare 4.6%
Narbacular Drop
Place a portal under your co-op partner while they are gesturing
12/31/2024
5:04:50 PM
Very Rare 5.5%
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list
12/31/2024
4:47:01 PM
Ultra Rare 1.4%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
12/31/2024
4:47:01 PM
Ultra Rare 1.7%
Back in the Fight
Start the Single Player Campaign on any difficulty.
12/31/2024
4:16:18 PM
Common 62.2%
Tactician
Earn 1 star in each mission of Special Ops Mission Mode.
12/31/2024
4:09:46 PM
Ultra Rare 2.3%
