Giant Robo: The Siege of Babel

Giant Robo: Babel no Roujou
ジャイアントロボ バベルの籠城

Source

manga

In the future, the third energy revolution starts with the invention of the Shizuma Drive and humanity celebrates a new era of prosperity. But lurking is the Big Fire, a secret organization that wants world domination. The International Police combating this threat counting with Giant Robo, a giant robot controlled by just a couple: Daisaku Kusama.

Prequel

manga

An alternate, slightly darker continuity of the Giant Robo OVA, featuring Daisaku Kusama amidst a power struggle between the International Police Organization (IPO) and the Magnificent Ten of Big Fire (BF group).