Avastar: Kingdom Hearts

Avastar: Kingdom Hearts is a fan-made storyline that is loosely based off of the universe of Kingdom Hearts. It was created by LegoAchemist a very long time ago, however, this story arc has recently been in the development progress for about three months now. Avastar: Kingdom Hearts is a part (the beginning, actually) of a story simply titled Avastar.

Unlike other Kingdom Hearts games, Avastar: Kingdom Hearts only takes place on one world, which instead has several visitable areas that function the same way worlds do. Only one original "world" makes a role in the story. The Dark City in the World That Never Was becomes visitable near the end of the game.

Prologue
15 years before the start of the story, a meteorite was discovered deep below the surface of Avastar by an underground government group called EAGLE. Inside the meteorite was an ancient alien life-form. Named GAIA SIN by EAGLE, the group took the life-form to a lab where it was to be studied. Over the course of three years, people from all over were gathered by EAGLE to have the cells of GAIA SIN tested upon them. However, GAIA SIN was too much for the human body, and all subjects were thought to have been killed, their bodies destroyed by G-SIN's cells. The studies found that the bodies of children were more immune to the cells, though only one child survived the tests. The child managed to escape the lab where he was being held, and found by an orphanage in Morcia City, where he lived up until high school. The project, meanwhile, was deemed a complete failure, and GAIA SIN was locked away, never to be awakened again.