"This "genetically enhanced" first-person shooter lets you do things never before possible in the genre: turn everything into a weapon, biologically mod your body with plasmids, hack devices and systems, upgrade your weapons and craft new ammo variants, and experiment with different battle techniques in an incredibly unique underwater city.

The game focuses on a secret underwater city named Rapture, created by a rich philanthropist by the name of Andrew Ryan. Andrew has the goal of creating a utopian society where the great and powerful would not be constrained by the poor, and where the world's elite could live without being bound by morality, government, or religion."