Bioshock creator Ken Levine says he feels "no pressure" to help produce a film adaptation, and we don't blame him.

You've already got one of the most critically acclaimed franchises in gaming history under your belt, and we expect yet another masterpiece when Bioshock Infinite arrives next year. So why mess with a good thing? Hollywood tends to bungle things, anyway.

But this fan-made trailer for a movie that doesn't exist yet really makes us want that film. Thing is, Bioshock has always been about the unparalleled atmosphere and great storylines, which could definitely come to life on the big screen. This teaser has exactly the right vibe…