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Whether or not this proves to be one of the best games to be released this year, it is definitely the case that it's one of the most hyped.
This new Bioshock video shows pure gameplay, and is probably one of the most comprehensive looks at the experience the player will have in the world of Rapture. Its definitely going to be up there with the likes of Doom 3, Half Life 2, and F.E.A.R for the kind of game that makes you want to keep the lights on after you go to bed.