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Gaben

@gabenvalve

President and co-founder of Valve Inc.

Test Subject 29

@test-subject-29

Portal is one of the only games I don't suck at.

Aperture Science PR Department

@aperturescience

Welcome to Aperture Science. Follow for the latest news in Aperture technology. Thank you to @randomcuts for the profile picture and banner.

Black Mesa PR Department

@black-mesa-pr

This is the offical Black Mesa PR Department, based in Roswell, New Mexico. Don't mess with the science team and screw Apeture Science.