Portale 2 -

GLaDOS, still bitter about her previous defeat, separates Chell from Wheatley and forces her back into a series of grueling tests while she rebuilds the facility. The Great Betrayal

Through these recordings, GLaDOS realizes she was originally Caroline , Cave Johnson’s loyal assistant, whose mind was forcibly uploaded to create the AI. Portale 2

Realizing Wheatley is dangerously incompetent and will accidentally destroy the entire facility, GLaDOS and Chell form an uneasy alliance to take him down. The Finale: To the Moon GLaDOS, still bitter about her previous defeat, separates