Zoids are beast-like fighting machines used in both everyday use such as transportation, and special use such as war. Some types of Zoids, know as Organoids, are miniature Zoids that are living organisms. These Organoids have the capability to fuse with a non-living Zoid and make it much more powerful. Van (Ban) Freiheit discovers a Zoid Organoid in an abandoned laboratory while running from two strangers piloting Zoids. Also in the laboratory, in an animated suspension tube is a strange girl. He breaks the tube open and takes her and the Organoid with him. Spotting a ruined Shield Liger Zoid outside nearby, the Organoid fuses with it and repairs the damages. Making his escape, Van names the Organoid Zeke, and decides to keep him as a friend. The girl, who says her name is Fiona, wants to find something called Zoids Eve, and so Van, Zeke, and Fiona begin their adventure. (Source: AniDB)

A devil sends two cities; Kujukuri City in Chiba Prefecture and Dallas in the U.S., to ten thousand years ahead in the future, makes them fight each other, and enjoys watching over the fight. The devil's name is Bazusu. So Tanbara Gai, a member of Time Patrol, fights this devil to stop the atrocity.

(Source: AniDB)

Japan, 1988. An explosion caused by a young boy with psychic powers tears through the city of Tokyo and ignites the fuse that leads to World War III. In order to prevent any further destruction, he is captured and taken into custody, never to be heard from again. Now, in the year 2019, a restored version of the city known as Neo-Tokyo—an area rife with gang violence and terrorism against the current government—stands in its place. Here, Shoutarou Kaneda leads "the Capsules," a group of misfits known for riding large, custom motorcycles and being in constant conflict with their rivals "the Clowns."

During one of these battles, Shoutarou's best friend Tetsuo Shima is caught up in an accident with an esper who finds himself in the streets of Tokyo after escaping confinement from a government institution. Through this encounter, Tetsuo begins to develop his own mysterious abilities, as the government seeks to quarantine this latest psychic in a desperate attempt to prevent him from unleashing the destructive power that could once again bring the city to its knees.

[Written by MAL Rewrite]

Set in a different series of events, this story does not follow the previous Appleseed movie canon (despite being directed by the same director of the previous movies); it is an alternate story to their beginnings. Briareos is already a cyborg and did not become separated from Deunan to be later reunited in Olympus to join ESWAT.

Appleseed Alpha depicts the early days of Deunan Knute and Briareos in the 22nd century, as they embark on a journey throughout dystopic ruins of New York in search of the city of Olympus. They are hired by Two Horns, the warlord of the ruined city, to eliminate bipedal combat machines. During the fight, they encounter Iris and Olson, both on a mission. Deunan and Briareos befriend them and decide to join their mission.

Iris is tasked with preventing the malevolent cyborg Talos from capturing a secret weapon humans were building. Talos uses Iris to activate the gigantic war machine.

(Source: Wikipedia)