Many millennia ago, an ancient advanced civilization known as Atlantis found a way to play god and created life, called the Gyaos, soon though, they got out of control, somehow being able to asexually reproduce themselves. To stop this, the Atlanteans created another creature, none other than Gamera, who had managed to defeat the Gyaos, however it was too late as the Gyaos had already destroyed Atlantis in the process. Gamera realized that before defeating them all, some of them had layed eggs, but the earth's mana was too great for them to hatch, knowing that they would one day, Gamera went into hiberation, until it happened.