Portal

7 of 15 ach. unlocked (47%)
Chekkaa's achievements in Portal
Beat two Portal advanced maps.
Apr 16, 11
Do whatever it takes to survive.
Dec 26, 10
Knock down a turret with another turret.
Dec 25, 10
Beat four Portal advanced maps.
Feb 14, 12
Complete Portal.
Dec 26, 10
Acquire the fully powered Aperture Science Handheld Portal Device.
Dec 25, 10
Make the correct party escort submission position decision.
Dec 26, 10
Earn gold medals on all Portal challenges.
Locked
Earn bronze medals on all Portal challenges.
Locked
Detach security cameras from the walls.
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
(0.1300/d/web1)