All About Video Games: Portal
Portal is a role-playing game where you are trapped in an evil science laboratory controlled by a robot who is obsessed with testing, GLaDOs. Soon into the game, you figure out she wants to kill you. You then kill her, and burn her into flames. In Portal 2, you come back and a new person comes, Wheatley, a morality core, guides you through but mistakenly wakens GLaDOs. She then makes you test again, through tons of test chambers. Once you get to her, Wheatley replaces GLaDOs' spot but then also becomes evil. You then need to get back to Wheatley and set things right and claim your freedom.