

The second game, as well as the Valve created comic Lab Rat, reveals that she was mistreated by the scientists and used a neurotoxin to kill the scientists in the laboratory before the events of Portal. While GLaDOS initially appears in the first game to simply be a voice that guides the player, her words and actions become increasingly malicious as she makes her intentions clear. GLaDOS is responsible for testing and maintenance in the Aperture Science research facility in all titles. The character was created by Erik Wolpaw and Kim Swift and voiced by Ellen McLain.

GLaDOS later appeared in The Lab and Lego Dimensions. "GLaDOS (Genetic Lifeform and Disk Operating System) is a fictional artificially intelligent computer system from the video game series Portal. All other trademarks are property of their respective owners. Valve, the Valve logo, Steam, the Steam logo, Source, the Source logo, Portal and the Portal logo are trademarks and/or registered trademarks of Valve Corporation.

She is ostensibly destroyed at the end of the first game but returns in the sequel, in which she is comically supplanted and temporarily stuck on a potato battery."Ī miniature GLaDOS version featured in a promotional video for Portal 2 from an old Aperture HD Cassette.

Portal 2 Perpetual Testing Initiative - GLaDOS (Valve Promotional Version)
