In the year 2010 AD hyper hurricanes devastated large parts of the Earth, with a death toll of over five billion humans. The well-established global economy and powerful military organizations were wiped out. North America, Russia, and Northern Europe are now covered by glaciers; large land masses sank in the oceans — the world's topography dramatically changed, with humanity on the brink of extinction, and civilization in utter chaos. The Japanese government created special economic areas which have achieved a limited degree of recovery after the disaster. Powered Assist Technology, which had long been under study, played an important role there restoration efforts. However, outside of these economic zones, in the surrounding slums, there is widespread poverty. The ruling class calls themselves Logos and maintains its position by force of arms, making full use of the Powered Assist Technology in their military. They call the poor Revenus, who are exiled to live outside the special economic areas.Time has passed since then. Katsuragi Jou and Tsurasawa Jin, escape from Phantom — a special unit created by Logos to keep the Revenus in check, and to hunt down renegade elements — taking with them a mysterious girl, Nobuto Sana. There are many factions interested in her, and so Jou and Jin face continued opposition protecting Sana, and the unspeakable secret connected to her past.

10 years has passed since Japan had decided to leave the United Nations to go into isolation. They have completely blocked the islands with an ultra magnetic field which prevents anyone to see what is going inside, nor for people to travel in/out of the country. This was a result to opposing to a treaty which UN has passed, preventing the development of all bio and robot technology which has evolved drastically and has become a threat to the human beings. When Japan finally begins to move, the US government sends in a special force team SWORD, lead by a female commander Vexille, to investigate what is really happening inside the closed country. What has become of Japan? Why did this happen? What is Daiwa trying to do? Who is Maria, and why is she helping Vexille? Will Vexille be able to find out the answers to avoid the world from falling apart? One mystery leads to another which directs to the dramatic ending....

Natural disasters have devastated planet Zi, killing off almost all life. A thousand years later humans have gradually re-established civilization, salvaging ancient Zoids through diving and mining efforts. In a village whose most previous item is a giant sword which they worship as a holy symbol. A teenage boy discovers an ancient Liger-type Zoid while on a deep water salvage operation. Suddenly the village is attacked by skeletal Bio-Zoids intent on stealing a powerful generator located in the village. Our teenage hero awakens the Liger and discovers that the town’s sacred sword is the Liger’s weapon, together they fight off the mysterious Bio-Zoids. At least for now…

It is a time of chaos. Earth is no longer what it used to be. It has been infested with a bug-like species called the Blue. Yuji Kaido, who has a mysterious disease, is put into suspended animation until a cure can be found. When he wakes up, Yuji learns that it has been more than 30 years since he was put into suspended animation, and the world is now controlled by these creatures. He then decides to join a group of soldiers fighting against the Blue in hope of a better future.