Return to the underwater city of Rapture in this anticipated sequel to 2007's critically acclaimed first-person shooter. Set approximately ten years after the events in the original, BioShock 2 casts you in the surprising role of a "Big Daddy," the prototype for the lumbering giants encountered in the first game. Your nemesis is, fittingly enough, a leader of the "Big Sisters," who plans on returning Rapture to its former glory. The Big Sisters are forming a new army of minions by snatching unsuspecting girls from the surface. Your goal is to put an end to the sinister scheme. Unlike the Big Daddies from BioShock 2's predecessor, you are more agile and have the ability to use plasmids to augment your deadly drill and rivet gun. Thanks to the Big Daddy's distinctive diving suit, you can also explore the briny depths outside of Rapture, but you won't necessarily be alone. Radio communication from Dr. Tennenbaum will keep you apprised of key developments, while Little Sisters can either be harvested for their powers or "adopted." The latter option has them tagging along to warn you of impending dangers or alert you to potential sources for more plasmids. BioShock 2 also features a multiplayer component developed by Digital Extremes. Multiplayer games take place prior to Rapture's fall, offering a new take on a familiar setting. Experience points earned during multiplayer combat can be used to unlock new weapons, plasmids, and gene tonics to customize characters.