During the final battle with Gaia, Gaia decided to send our favourite demigod to rapture. Upon arrival on Rapture he is turned to one of the Big Daddies in the Alpha Series. How will this affect the relationship with his friends? Will he stay as a Big Daddy or return as a human. Also who is the little girl that keeps calling him Daddy? *Under Rewrite process*

A secret lost beneath the waves. A camp of children who have a common secret. After decades, the secret of the city of Rapture comes to the surface, on the shores of Camp Half-Blood.

Percy goes missing investigating a strange madness that's infecting sea creatures, and a darker plot is revealed, leaving it up to Annabeth to save both him and the world from the madness that is hidden in Rapture. Puts events of Bioshock several decades after 1960. Jack never came to Rapture, Ryan and Atlas are still fighting their war. Percy Jackson right after The Last Olympian.

Instead of going to calypso's island percy winds up in rapture, panick insues as percy unravels a mystery about the past