The single player for BioShock 2 is currently being developed by 2k Marin, and also 2k Australia. Taking place 10 years after the original you assume the role of the first Big Daddy. After awakening in the city you have no recollection of what has previously happened. Rapture now has a new antagonist, a women that goes by the name of Sophia Lamb. She has created an army of Big Sisters that have been sent out to abduct girls and drag them back to Rapture to be turned into Little Sisters.