Bioshock 1 and Bioshock Infinite called to very different crowds/people. Were largely separate stories (although in the same world) and from what I understand Bioshock 2 is the first but worse. So it could of worked as separate stories, but at the same time it's big tale and world was ending. Nothing screamed for a sequel or continuation of that series. But seeing the company itself fall, who could of went on to make other great games? That does suck.