BioShock might not be a traditional horror game, but it has many of the elements that make for a terrifying game - mutant monsters, the spooky environment of the underwater city of Rapture, and creepy little girls. But really, it's the disturbing story that makes it truly scary - from the moral dilemmas its presents you with to the horrifying tale of human plans gone very, very wrong.
Platform: Xbox 360, PC, PS3, Mac
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