BioShock is designed to be a completely non-linear experience.

We saw freakish women who can crawl on walls and ceilings and are more than happy to eviscerate you with the sharp blades they hold in each hand. A glimpse of the concept art for BioShock reveals a ghoulish man dressed like a 1950's football player, another shows a doctor that would be the last person you'd ever want to give you a check-up. Some of these people will be oblivious to your presence, while others will attack you on sight

BioShock has a unique atmosphere that blends 50's music with old-school sci-fi gadgets, horrific enemies, and a sense of unease that I haven't felt since I saw The Ring. It's also been a while since fantastic graphics have been blended with such a unique art style. The design of Rapture is 1950's art deco with a bit of Jules Verne and Rube Goldberg thrown in for good measure. No grey offices or endless brown corridors here.
si si si

usa l'unreal engine... speriamo solo che non serva per forza quella minchiata dell'AGEIA...