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