Rapture is a fictional city-state in the BioShock series published by 2K Games. It is an underwater city that is the main setting for the games BioShock and BioShock 2. The city also briefly appears in BioShock Infinite, and is featured in its downloadable content, Burial at Sea. The game's back-story describes the city as envisioned by business tycoon Andrew Ryan in the mid-late 1940s as a means to create a utopia for mankind's greatest artists and thinkers to prosper in a laissez-faire environment outside of increasing oppression by the world's governments and religion. However, the lack of government led to severe wealth disparity, a powerful black market, and unrestricted genetic modification, which turned the city into a dystopia exacerbated by Ryan's tyrannical methods to maintain control. The masses turned towards political activists like Atlas who advocated an uprising of the poor against Ryan and the elite of Rapture; and on the eve of 1959, a civil war broke out, leaving much of Rapture's population dead. The remaining citizens either became psychotic "Splicers" due to the effects of ADAM, a substance that can alter genetic material, or have barricaded themselves from the Splicers to protect themselves, leaving the city to fail and fall apart around them.

BioShock is a retrofuturistic video game series created by Ken Levine, published by 2K and developed by several studios, including Irrational Games and 2K Marin. The BioShock games combine first-person shooter and role-playing elements, giving the player freedom for how to approach combat and other situations, and are considered part of the immersive sim genre. Additionally, the series is notable for exploring philosophical and moral concepts with a strong in-game narrative influenced by concepts such as Objectivism, total utilitarianism, and American exceptionalism.