This is Part 5 of my Bioshock Infinite Gameplay Walkthrough. To escape Colombia by Zeppelin, Booker and Elizabeth need to find a power cell, which is being held by the evil war veteran Slate. 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.