Lab Rat
Objective: Acquire the fully powered Aperture Science Handheld Portal Device.

Fratricide
Objective: Do whatever it takes to survive.

Partygoer
Objective: Make the correct party escort submission position decision.

Heartbreaker
Objective: Complete Portal.

Friendly Fire
Objective: Knock down a turret with another turret.

Cupcake
Objective: Beat two Portal advanced maps.

Fruitcake
Objective: Beat four Portal advanced maps.

Long Jump
Objective: Jump 300 feet.

Vanilla Crazy Cake
Objective: Beat all six Portal advanced maps.

Terminal Velocity
Objective: Fall 30,000 feet.

Camera Shy
Objective: Detach security cameras from the walls.

Transmission Received
Objective: ..?

Rocket Science
Objective: Earn silver medals on all Portal challenges.

Basic Science
Objective: Earn bronze medals on all Portal challenges.

Aperture Science
Objective: Earn gold medals on all Portal challenges.Added 31/08/2011 GMT