No. 57: System Shock 2 – 100 Greatest Games Ever

Ken "Bioshock" Levine's first step into horror was incredibly successful. A first-person shooter mashed together with role playing elements, the game follows a storyline heavily influenced by classic horror and sci-fi flicks.

You play a soldier who awakens in a spaceship cryotube with no knowlege of what's happening, only to find out that aliens have infested the ship and all the crewmates. Worse yet, he's got to deal with an AI named SHODAN who probably doesn't have his best interests at heart.

Atmospheric, deep and a precursor to EA's Dead Space series, it still holds up as one of the scariest games ever made.

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