10 Video Game Villains That Switched Sides In The Sequel
2. GLaDOS - Portal 2
Is there a better heel-face turn in the history of video games than GLaDOS, the murderous operating system who puts Chell through the wringer in the original Portal?
Though Portal 2 picks up with GLaDOS very much a villain, that all changes when Wheatley is put in charge of the Aperture Science Enrichment Center and inserts GLaDOS into a potato battery.
GLaDOS is then paired with Chell for the rest of the game, with the two teaming up in an attempt to escape the facility.
At the end of the game, GLaDOS - who has since been returned control of the facility - even saves Chell from certain death after she sucks Wheatley and herself into space, and ultimately decides to let her leave even when her original personality is reverted.
If that ain't character development, what is?