BioShock is a first person action/horror game set in 1960. The player takes the role of a plane crash survivor Jack who explores an underwater dystopian (opposite of utopian) underwater city named Rapture.
Rapture was secretly built in 1946. by a Andrew Ryan, a wealthy buisinessman. Genetic experiments went wrong and the city is now full of mutants that the player has to defeat.
The game received very good reviews, especially for the original story and other gameplay elements.