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