During the Credits
Concept art and postcards from Rapture are shown alongside the credits of BioShock.
After the Credits
There is an extra scene that shows a brief teaser for BioShock 2: Sea of Dreams.
The extra scene shows a little sister who is now grown up, standing on the shores of a beach and watching the sunset. As the camera slowly zooms out, the sand behind her forms into a city and the BioShock 2: Sea of Dreams logo appears. The title of the sequel would later be changed to just BioShock 2 with the producers dropping “Sea of Dreams” from the title.
There are three different endings depending on the choices a player makes throughout the game when dealing with little sisters.
Ending 1: If all the little sisters are saved
There is an extra scene that shows Jack bringing the little sisters to the surface and raising them as his own. Scenes are then shown of the little sisters going on to graduate from school, get married, and have children. The final scene shows Jack on his death bed with the little sisters (now grown up) all still by his side.
Ending 2: If all the little sisters are harvested
There is a cutscene showing a submarine carrying nuclear missiles that comes across the wreckage of the plane. The submarine is suddenly surrounded by bathyspheres containing Splicers who begin attacking the humans on board in order to seize control of the nukes.
Ending 3: If some little sisters are saved and others are harvested
Exact same cutscene as Ending 2, but with a different tone from the Tenenbaum that is more sad and disappointed than angry.