System Shock 2

While the first System Shock game was largely overlooked, the second game managed to hone its formula and make its way into gamers hearts. A first-person shooter turned role-playing game, it was the spiritual predecessor to the BioShock series. Despite this, you won't see underwater cities. System Shock is a clear sci-fi title, imbued with aspects of cyberpunk. You assume the role of a soldier, woken earlier from a cryo-tube with severe amnesia and an illegal neural interface. It's a chilling scenario that's perfectly represented in the game's atmosphere, punctuated by great voice acting, sound effects, and ambiance. With the guidance of Dr. Polito, you must discover what's happened on the spaceship, your interface picking up the ghosts of dead crew members. It makes for a tense and horror-filled environment, littered with cybernetic enemies and great AI. You can dispatch them in whatever way you wish, building a character that focuses on combat, technology, psychic powers or more. It's a fantastic blend of sneaking, hacking, and shooting that will keep you constantly on edge.