This main game, released in 2007, is a first-person shooter blending RPG and puzzle elements set in the decaying, steampunk-inspired underwater dystopia of Rapture. Players explore the ruins, surviving by hacking systems, upgrading weapons, and biologically modifying their character with 'Plasmids' to gain supernatural powers for combat experimentation. The core experience focuses on uncovering the city's chaotic history following a 1960 plane crash.
The gameplay loop centers on exploration, combat, and resource management within the decaying underwater metropolis. Players are encouraged to utilize their environment and modify their capabilities extensively to overcome threats.
A defining feature is the ability to biologically modify the player character using substances found throughout the world. These modifications, known as Plasmids, grant supernatural powers, allowing players to manipulate fire, electricity, or telekinesis in combat. This system integrates deeply with traditional shooter mechanics, encouraging experimental combat strategies.
Furthermore, players can upgrade their arsenal of conventional weaponry and engage with environmental systems. Hacking security devices, repairing machinery, and crafting specialized ammunition variants are all integral components of navigating Rapture and surviving encounters.
The game is renowned for its strong aesthetic, often described as steampunk-inspired, contrasting the grandeur of its initial vision with the current state of decay and horror. The audio and visual design work together to create a deeply immersive and unsettling atmosphere as the player pieces together the narrative fragments left behind by Rapture's inhabitants.
The RPG aspects are primarily driven by player choice in character development. Decisions regarding which Plasmids to adopt, which weapons to prioritize, and how to approach various encounters directly shape the player's capabilities and survival path through the narrative.
While the core experience remains rooted in its 2007 foundation, the title has been updated through a remaster, ensuring its visual and technical presentation remains accessible on modern systems. Critical reception has historically focused on its absorbing plot and unique gaming experience.
The game contains depictions of realistic-looking violence. The game contains bad language (e.g. sexual expletives or blasphemy). The game contains elements that encourage or teach gambling. These simulations of gambling refer to games of chance that are normally carried out in casinos or gambling halls.
Strong horror violence and themes

BioShock Remastered was released as a part of BioShock: The Collection and also available separately for PC. The remastered version has achievements, full controller support, high resolution textures, models and interface, and 4K resolution support.

The iOS port of BioShock is a completely functional version of the original game with a graphics engine optimized for iOS devices. The mechanics are identical to the original game with all the same Plasmids, Gene Tonics and Weapons. One noteworthy function this version lacks is jumping and the Research Camera feature. The game can additionally be played with a separate Bluetooth-enabled controller.

The year is 1960 and the player character, Jack, is on board a plane crossing the Atlantic ocean. Things go wrong though and the plane crashes. Jack is lucky though and finds himself outside a lighthouse. This is no ordinary lighthouse however. It leads to Rapture, an Utopian underwater city built by the tycoon Andrew Ryan. It's not long until Jack is contacted by a man called Atlas who offers Jack his support.

The PlayStation 3 port of BioShock was released with exclusive content, including the possibility to purchase a downloadable add-on called "Challenge Rooms" and a harder difficulty level.