Do whatever it takes to survive.
Knock down a turret with another turret.
Acquire the fully powered Aperture Science Handheld Portal Device.
Beat two Portal advanced maps.
Beat four Portal advanced maps.
Beat all six Portal advanced maps.
Complete Portal.
Detach security cameras from the walls.
Make the correct party escort submission position decision.
Earn bronze medals on all Portal challenges.
Earn gold medals on all Portal challenges.
Earn silver medals on all Portal challenges.
Fall 30,000 feet.
Jump 300 feet.
..?
94
298
1855
5456
250
41
7
0