Portal Series - GLaDOS

GLaDOS (Genetic Lifeform and Disk Operating System) is an artificially intelligent computer system from the video game series Portal. GLaDOS was originally intended to be present solely in the first area of Portal; she was well received by other designers and her role was expanded as a result.

Universally praised for her contributions to the caliber of Portal's narrative, GLaDOS received multiple awards for being the best new game character in 2007 from GameSpy, GamePro, and X-Play. While the game was initially designed with other characters, they were later removed, leaving GLaDOS as the only character players encounter.