Amnesia - Welcome to Rapture? - unfinished-

[Nickshrike]

If the makers of Bioshock didn't want it up they would send a cease and desist order to you for it to be taken down, highly unlikely as you are not making money from it.
I don't believe they would have the power to sue you for it and put you in legal trouble if your not making money and even if they did, I doubt they would even bother.

Just continue with it, nothing too bad can happen. The story itself looks fantastic though, the models look like they have been ripped pretty well