BioShock Infinite: Burial at Sea

BioShock Infinite: Burial at Sea is an episodic expansion to the first-person shooter video game BioShock Infinite, and a prequel to the original BioShock. It was developed by Irrational Games, and published by 2K Games. It is available on Linux, Microsoft Windows, PlayStation 3, Xbox 360, and OS X. Burial at Sea consists of two episodes. Episode 1 was released worldwide via download-only on November 12, 2013, and Episode 2 was released on March 25, 2014.[1] A retail version for PlayStation 3 and Xbox 360 was released on November 4, 2014 as part of BioShock Infinite: The Complete Edition.

Burial at Sea is set after the events of BioShock Infinite, which spanned several alternate realities and was themed on the nature of choice. Whereas Infinite took place aboard Columbia, the floating air city set in 1912, Burial at Sea takes place in an alternate reality within the underwater city of Rapture, a year before the events of the first BioShock game (which is set in 1960). The game features Booker DeWitt as a private detective, and Elizabeth as a femme fatale who employs Booker's services