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