Getter Robo Āḥ

Years after the events of Getter Robo/Shin Getter Robo, Hayato Jin is the leader of NISAR; a private owned research and weapons development organization based in Japan. He, and Professor Tachibana, have been developing various weapons and building up their forces to deal with a threat that started fifteen years ago: the mad scientist Rando. When Rando's forces begin their terrorist operations around the world, NISAR begins its search for exceptional soldiers to pilot their super weapon, the Getter Robo.

A compilation of the long-running Getter Robo series into one continuous story. Includes several new pages and chapters as well as revisions to old material and a newer, more conclusive ending to Getter Robo Āḥ. 

Getter Robo (1974)
Getter Robo G (1975)
Getter Robo Go (1991)
Shin Getter Robo (1997)
Getter Robo Āḥ (2001)