The Gaia Manuscripts (ガイア文書,Gaia Bunsho?, lit. Gaia Documents) are important objects that appear in Sonic Unleashed. These manuscripts are an ancient collection of documents, records and knowledge concerning a legendary disaster, known as the Time of Awakening, caused by the previous emergence of Dark Gaia, which occurred tens of thousands of years before the events of Sonic Unleashed. They were initially stolen by Dr. Eggman prior to the game in his attempt to awaken Dark Gaia, but they were reclaimed by Sonic and his friends who later used them to undo the doctor's work.
The Gaia Manuscripts contains an encyclopedia of knowledge concerning everything connected to the disaster created by the second-most recent time of awakening, such as records of the disaster, info on the Gaia Temples and their locations, the nature and weaknesses of Dark Gaia's Minions, a detailed description of Dark Gaia and its being, and scenarios of what would happen should Dark Gaia succeeded in its mission. These texts are written in an ancient language that so far only Professor Pickle has been able to decipher.
"The abomination grows strong on the negative energies of the world, sleeping within its core for millennia in wait..." - Gaia Manuscripts, 4:11.
"When the beast is complete, its dark arms shall encompass the planet, ushering in the end of times. The world, in death, will fall into a deep sleep in waiting for the time of rebirth to come." - Gaia Manuscripts, 4:28.
"And the world shall be plunged into the dark of night, the dark of destruction."
"Light shall put out darkness to rout."
Some tens of thousands of years prior to Sonic Unleashed, the time of awakening had arrived, where Dark Gaia had matured enough to awake from its slumber and attempt destroying the planet again as it has done countless times before. As a result of its awakening, Dark Gaia broke the planet into pieces in an event that would be passed down into legend as a legendary cataclysm that threaten the existence of the world.
True to the cycle, however, the crisis was averted by Light Gaia, who defeated Dark Gaia, returned it to the core and restored the planet to normal. At some point during or after the cataclysm, the events and the knowledge that were gained from the event, was recorded by an unknown civilization. These records would then become known as the Gaia Manuscripts.
In the present day, the Gaia Manuscripts came into the possession of Professor Pickle, an expert on ancient literature. The Gaia Manuscripts, however, were stolen by Dr. Eggman, shortly before the beginning of Sonic Unleashed, who sought to awaken Dark Gaia prematurely and use its essence to build Eggmanland. With the knowledge found within the Gaia Manuscripts' contents, Dr. Eggman devised a way for him to awaken Dark Gaia, namely his Chaos Energy Cannon. The doctor later stored the Gaia Manuscripts within a vault in his base in Mazuri, where he also kept Professor Pickle captive.
After Dr. Eggman succeeded in awakening Dark Gaia and breaking apart the Earth, Professor Pickle was freed by Sonic the Werehog, Tails and Light Gaia (nicknamed Chip) and the group reclaimed the Gaia Manuscripts as they contained information that was needed to restore the planet. With the info provided by the Gaia Manuscripts, Professor Pickle formulated a plan of action for Sonic and enlisted him to seek out the Gaia Temples written in the Gaia Manuscripts to restore the planet.
The Gaia Manuscripts remained in the care of Professor Pickle afterwards, who continued to research them for additional information. The information contained within them proved to be a great assist to Sonic, such as providing him with the location of the Gaia Temples and uncover the way for him and Chip to free people from the influence of Dark Gaia's Minions.
Professor Pickle with the Gaia Manuscripts.
A world map found in the Gaia Manuscripts.
A page in the Gaia Manuscripts describing Dark Gaia.
A page in the Gaia Manuscripts depicting the shattered Earth.