Internet person KatMann has done something wonderful to an old Monopoly board: Developed a custom BioShock "mod", letting you play a Rapture version of the classic game.
Best part? Unlike other novelty Monopoly games you buy in a store, this one works with one you've already got, so it's 100% (though to be honest, you don't even need an original, just print this stuff off and play!).
After you've braced yourself for the torrent of "Is a man not entitled to $200" jokes every time someone passes Go, you can download it at the link below.