Achievement Game Visibility Global Unlock Date Added
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
Portal 2 5.0% 2016-03-24
Bridge Over Troubling Water
Complete the first Hard Light Bridge test
Portal 2 62.8% 2016-03-24
Stalemate Associate
Press the button!
Portal 2 54.5% 2016-03-24
Four Ring Circus
Enter 4 different portals without touching the ground in co-op
Portal 2 6.8% 2016-03-24
Vertically Unchallenged
Master the Repulsion Gel
Portal 2 51.5% 2016-03-24
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course
Portal 2 30.1% 2016-03-24
Scanned Alone
Stand in a defective turret detector
Portal 2 41.2% 2016-03-24
Partygoer
Make the correct party escort submission position decision.
Portal 57.2% 2016-03-24
Vanilla Crazy Cake
Beat all six Portal advanced maps.
Portal 8.7% 2016-03-24
Cupcake
Beat two Portal advanced maps.
Portal 20.0% 2016-03-24
Rocket Science
Earn silver medals on all Portal challenges.
Portal 1.6% 2016-03-24
Aperture Science
Earn gold medals on all Portal challenges.
Portal 1.5% 2016-03-24
Transmission Received
..?
Portal 3.0% 2016-03-24
Friendly Fire
Knock down a turret with another turret.
Portal 51.0% 2016-03-24
Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device.
Portal 82.8% 2016-03-24
Camera Shy
Detach security cameras from the walls.
Portal 2.9% 2016-03-24
Fratricide
Do whatever it takes to survive.
Portal 65.4% 2016-03-24
Fruitcake
Beat four Portal advanced maps.
Portal 12.3% 2016-03-24
Long Jump
Jump 300 feet.
Portal 13.0% 2016-03-24
Basic Science
Earn bronze medals on all Portal challenges.
Portal 1.6% 2016-03-24