In BioShock Infinite , the player becomes detective Booker DeWitt who is forced to find a young woman Elizabeth to pay off his debts. She is held captive in the floating city of Columbia, an alternate version of 1912, where different factions within the city are battling one another. The Founders want Columbia to remain a city only for pure Americans, while the Vox Populi think the city should be available to anyone. The setting is built around the idea of exceptionalism with a strong religious doctrine and open racism. Elizabeth is a key piece within this conflict and has a mysterious origin, including her powers to cause tears in the fabric of space-time, exposing parallel universes. Booker and Elizabeth remain together most of the game, and she acts on her own, tossing ammo and silver eagle coins to Booker, who can be asked to pick locks. They are hunted down by the spiritual leader Comstock and his troops, along with the giant mechanical Songbird.
The game uses similar gameplay styles and mechanics found in previous BioShock games. Vigors give the player super powers, such as sending a murder of crows to peck away enemies or charming enemies to defend you. Another vigor is possession, used to take over humans or machines to temporarily turn them into allies. Once the effect wears off, the possessed humans will commit suicide. Most vigors have multiple uses, either as a direct attack or as a much stronger trap awaiting to be triggered. Booker can also be upgraded through four types of gear with permanent bonuses. Different types can be equipped according to the situation. The typical FPS array of weapons is available throughout the game, such as pistols, shotguns, and rifles. One notable weapon is the Sky Hook, which can be used as a melee weapon to take down an enemy. Money can be exchanged at vending machines for upgrades and consumables. Items are found by looting barrels, desks, and enemies. Vigors can only be executed when a sufficient amount of salt has been collected. The three main bars visible on the screen (health, salt, and shield) can be extended by locating and using infusions. The story is also furthered through optional voxophones and kinetoscopes.
Skylines provide a unique way to move throughout the world. Using the Sky Hook, the player can attach to these lines and quickly slide in one direction or another. These can be used to escape overwhelming situations or reach higher ground to gain a combat edge.
BioShock Infinite was released on March 26th, 2013 for the Playstation 3.