BioShock 2 is a first-person shooter video game developed by 2K Marin for Microsoft Windows, PlayStation 3 and Xbox 360. The sequel to the 2007 video game BioShock, it was released worldwide on February 9, 2010. The OS X version of the game was released by Feral Interactive on March 30, 2012.
The game is set in the fictional underwater dystopia of Rapture. The game opens with a cutscene set in 1958 then jumps 10 years to when Delta wakes up in 1968, eight years after the events of the first BioShock. The protagonist and player-controlled character is an Alpha series of Big Daddy, a human being that has been mentally conditioned to protect Little Sisters which is amongst the first of its kind.