Cupcake
Beat two Portal advanced maps.
Fruitcake
Beat four Portal advanced maps.
Vanilla Crazy Cake
Beat all six Portal advanced maps.
Heartbreaker
Complete Portal.
Camera Shy
Detach security cameras from the walls.
Partygoer
Make the correct party escort submission position decision.
Basic Science
Earn bronze medals on all Portal challenges.
Aperture Science
Earn gold medals on all Portal challenges.
Rocket Science
Earn silver medals on all Portal challenges.
Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device.
Friendly Fire
Knock down a turret with another turret.
Terminal Velocity
Fall 30,000 feet.
Fratricide
Do whatever it takes to survive.
Long Jump
Jump 300 feet.
Transmission Received
..?