Giant Robo THE ANIMATION: Chikyuu ga Seishi Suru Hi

IPO成員從Big Fire手中奪回被竊取的Shizuma Drive，引發涉及Daisaku Kusama的衝突。

A ragtag group known as the "International Police Organization", formed by members across the globe, comes into the possession of an attache case which was owned by the corporation known as "Big Fire". Inside is an abnormal looking "Shizuma Drive", the main power source which is being widely used in this futuristic world. "Big Fire" is not at all pleased that this unique Shizuma Drive has gone missing, and decides to track it down, attacking the members of the IPO. However, the International Police Organization have a way of fighting back, and it comes in the form of a boy named Daisaku Kusama, who is able to control a robot known as Giant Robo.

城市大停電中，Big Fire Member追擊Shizuma Drive

One of the members of "Big Fire" is on the trail of the IPO, looking to retrieve the unique Shizuma Drive from them. Daisaku summons the help of Giant Robo to defend them. Meanwhile, a blackout happens all across the city, which causes any Shizuma-powered device to be deactivated.

電磁網行動：上海淪陷

The Anti-Shizuma sphere, being controlled by Big Fire, is headed on it's way to Shanghai, to destroy an oil refinery, which is considered the last source of energy on the planet. As a countermeasure, the IPO sets up antique electromagnetic cannons which are not powered by Shizuma drives, in order to stop the refinery from being destroyed. Meanwhile, the leader of the IPO order Giant Robo to be sealed away, much to the chagrin of Daisaku. Will he listen to those orders, or will he have Giant Robo lend a hand in the fight?

超級英雄黃昏：勝利鐘聲尚未響起

Bashtarle的真相：青春時代已結束

犯罪與懲罰：為了大火的萬事萬物

最終章：漸逝的美麗幻夜