Who is really Booker DeWitt? What is Columbia? And why is Elizabeth the center of the whole story? All the answers are within the final moments of BioShock Infinite. The ending is densely filled with vital information, in which the whole logic behind the story is finally unveiled and everything will make proper sense, or not. BioShock Infinite focuses many scientific topics relating time travelling and alternative dimensions; those subjects can be quite enigmatic no matter where they’re discussed.