Set in the fictional underwater dystopian city of Rapture, the game's story takes place eight years after BioShock. Assuming control of Subject Delta, a hulking Big Daddy, players are tasked with fighting through Splicers, the psychotic human population of the city, using weapons and an array of genetic modifications. The game also includes a story-driven multiplayer mode that takes place during Rapture's civil war, before the events of the first game.
As in BioShock, the player explores Rapture and fights off Splicers using a combination of weapons, the environment, and plasmids. Plasmids function akin to magic and must be recharged with "EVE" to be used. The player can also equip "tonics", passive bonuses that range from increased speed to reduced EVE usage. Several of the weapons in BioShock 2 were previously seen carried by Big Daddies in the first game, including a powerful drill and a rivet gun. Unlike the previous game, the player can use each weapon in a close-range melee attack, and is able to equip a weapon and a plasmid at the same time. If the player is killed, they are revived via "vita-chambers."
From the back of the box: The undersea city of Rapture stands in ruin. Somewhere deep within, your Little Sister awaits. Once, you protected her and now, amongst hordes of genetically-altered maniacs, she is your only hope for salvation.
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