BioShock 2 is the second game of the BioShock series and the sequel to BioShock. It continues the grand storyline of the underwater metropolis Rapture. BioShock 2 capitalizes and improves upon the high-quality effects, unique gameplay elements, and immersive atmosphere that defined the first game. It explores more brutal gameplay than its predecessor, with new enemies, weapons, Plasmids, and Gene Tonics.