Returning to Rapture, the failed utopian underwater world of 2007's story-driven shooter BioShock, was a tricky proposition for 2K Games. Well, maybe not for the company's shareholders; following a hit with a sequel is always a no-brainer for the bean counters. But for everyone else, revisiting a property that was so perfectly self-contained posed the risk of alienating fans and tarnishing its good name. 97/100