The Talos Principle underwent 15,000 hours of playtesting — but not by humans (interview)
GamesBeat: "It’s fitting, in this game that makes you a human playing a self-aware robot, that almost all the playtesting — some 15,000 hours’ worth — was done by a bot pretending to be human. It did so much testing that the developers started referring to it as “him” and gave it a pet name: Bot."
