Portal

4 of 15 ach. unlocked (27%)
Katya's achievements in Portal
Knock down a turret with another turret.
May 29, 12
Complete Portal.
May 30, 12
Acquire the fully powered Aperture Science Handheld Portal Device.
May 31, 12
Make the correct party escort submission position decision.
May 29, 12
Earn gold medals on all Portal challenges.
Locked
Earn bronze medals on all Portal challenges.
Locked
Detach security cameras from the walls.
Locked
Beat two Portal advanced maps.
Locked
Do whatever it takes to survive.
Locked
Beat four Portal advanced maps.
Locked
Jump 300 feet.
Locked
Earn silver medals on all Portal challenges.
Locked
Fall 30,000 feet.
Locked
..?
Locked
Beat all six Portal advanced maps.
Locked
(0.1489/d/web8)