7. GlaDOS (Portal 2)

Portal 2’s predecessor was a great puzzle game released in 2007 that stood out due to its clever premise and witty writing. And the game’s physics-based puzzles were particularly original, as they involved using a portal gun to open portals in the game’s levels in order to clear obstacle courses and reach the exit.

Like the original game, Portal 2 took place in the Aperture Science facility run by the evil Artificial Intelligence (AI) known as GlaDOS. The game’s protagonist Chell turned GlaDOS into a pile of burning metal in the previous game, after discovering that the cake it promised for clearing the game’s levels was a “lie”. But then GlaDOS was something of a ruthless machine, having murdered the scientists who ran the Aperture Science facility and would resort to any kind of manipulation in order to use Chell as a test subject and make her navigate the facility’s dangerous test chambers. And GlaDOS had a remarkable personality for a character who is after all a robot, and is definitely one of the most memorable villains in video gaming.

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