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