Debted to the wrong people, with his life at stake, U.S. Cavalry veteran and now mercenary, Booker DeWitt has only one chance to clear his account. He must rescue Elizabeth, a mysterious girl imprisoned since childhood and locked up in the flying city of Columbia. Forced to trust each other, Booker and Elizabeth form a strong bond during their daring escape. Together, they learn to harness an expanding arsenal of weapons and skills as they battle zeppelins in the clouds, along high-speed Sky-Lines, and on the streets of Columbia, while surviving the threats of the aerial city and unraveling its dark secrets. Key Features City in the Sky – Leave the depths of Rapture to soar into the clouds of Columbia. This technological masterpiece, the flying city, is a beautiful and vibrant world that hides a very dark secret. Improbable Mission – Set in 1912, mercenary Booker DeWitt must rescue a mysterious girl from the heavenly city of Columbia or never leave it alive. Whip, Roll and Kill – Turn the city's Sky-Lines into armed roller coasters as you glide through the flying city and inflict deadly punishments. Tear Time Apart – Open Cracks in Time and Space to shape the battlefield and turn the tide of combat by pulling weapons, turrets, and other resources out of the air. Powerful Powers – Throw explosive fireballs, shoot lightning, and unleash murderous flocks of ravens as powerful Powers sweep through your body to unleash yourself against all who oppose you. Customized Combat Experience – With deadly weapons in one hand, powerful Powers in the other, and the ability to open Cracks in time and space, fight your way through the flying city of Columbia to save Elizabeth and achieve freedom. 1999 Mode – After completing BioShock Infinite, the player can unlock the "1999 Mode" game mode, which gives experienced players a taste of what kind of design and balance hardcore gamers enjoyed in the twentieth century.