Set during the fall of Rapture, players assume the role of a Plasmid test subject for Sinclair Solutions, a premier provider of Plasmids and Tonics in the underwater city of Rapture that was first explored in the original BioShock. Players will need to use all the elements of the BioShock toolset to survive as the full depth of the BioShock experience is refined and transformed into a unique multiplayer experience that can only be found in Rapture.