10.89%
Fingerprinter
Smear your dirty fingers over Aperture's beautiful glass
11.88%
Two times the charm
Solve the Chamber 6-2 twice
12.87%
Supply Chain Problems
Deplete the gel supply in Chamber 4-11
13.86%
Pacifist
Complete the Chamber 4-9 without knocking over any turrets
14.85%
Just in time
Deplete the conveyors' supply of Weighted Storage Cubes
14.85%
Refreshing shower
Take a shower under one of the gel cleansing fields
15.84%
Still a pacifist
Complete Chamber 5-1 without destroying any turrets
19.80%
Endless loop
Fling in an endless loop in Chamber 4-11
19.80%
Captivating Looks
Stare at Conly's mannequins for a really long time
24.75%
The fun solution
Solve Chamber 6-6 the fun way
25.74%
Bullseye
Get the ball in 4-10 to land perfectly in the socket
30.69%
Sending a message
Blow up a test chamber sign