This is Part 6 of my Bioshock Infinite Gameplay Walkthrough. Booker and Elizabeth finally make it to the Zeppelin to escape Columbia! I'm playing Bioshock Infinite on the PC :Dbr br BioShock Infinite Walkthrough Playlist:br br Set in 1912 during the growth of American Exceptionalism, the game's protagonist, former Pinkerton agent Booker DeWitt, is sent to the floating air-city of Columbia to find a young woman, Elizabeth, who has been held captive there for the last twelve years.