Gaia Manuscripts

The Gaia Manuscripts (ガイア文書) is an important object that appears in Sonic Unleashed. It is an ancient scroll that contains an collection of documents, records and knowledge concering a legendary cataclysm caused by the awakening of Dark Gaia which occurred some tens of thousands of years prior to the events of Sonic Unleashed.

History
Some tens of thousands of years prior to Sonic Unleashed, Dark Gaia followed its cycle and awoke from its slumber within the Earth's core, now at this point having matured enough to attempt destroying the planet once more. As a result of its awakening, Dark Gaia broke the planet apart into pieces in an event that would be passed down into legend as a legendary cataclysm that threaten the existence of the world.

Following the cycle however, the crisis was averted by Light Gaia, who defeated Dark Gaia and restored the planet to normal. At some point during or after the cataclysm, the events and the knowledge that the people gained from it, was recorded down by an unknow civilization. These records would then become know as the Gaia Manuscripts.

In the present day, the Gaia Manuscripts came into the possession of Professor Pickle of Spagonia University, who became an expert on the matter. The Gaia Manuscripts (and the Professor) were however stolen by Dr. Eggman who sought to awaken Dark Gaia prematurely and use it for his own gain.