Getter Robo

After Emperor Gore and the Reptilian empire is defeated, a new enemy, Emperor Burai and his Hyakki empire rises and threatens to take over Earth. Ryoma, Hayato, and newcomer Benkei pilot the new Getter Robo G to save Earth. (Source: Anime News Network)

This series continues the Ken Ishikawa continuity of Getter manga, temporally taking place after Getter Robo Go and before Getter Āḥ. The series features an older Hayato leading a new team of Getter Pilots (and a new Getter) as they defend the earth from large plant-like monsters. (Source: Wikipedia) Note: Includes an extra chapter that was published on the last volume.

Devilman vs Getter Robo is a crossover manga between Devilman and Getter Robo. Its Devilman characters combine elements from their TV-series and manga counterparts.

Dino Getter is a manga series by Kazumi Hoshi for the 40th anniversary of Getter Robo. It introduces the Dino Getter Robo in an original eight chapter story about a battle between the Dinosaur Empire.

A mysterious monster called the High Beast, has taken control of the regions of Eurasia and Africa. Japan has cut off from the mainland to protect itself from this threat. The daughter of a legendary mahjong player discovers that monsters attack whenever a mahjong piece is hit across the board. This allows humans to be separated from the battle and for mahjong players to effectively combat the monsters with robots controlled through mahjong moves.

A manga adaptation of the of Toei TV series, published in Bessatsu TV Land in the 1973 March and April issues. (Source: Wikipedia Japan)

They call them Devolved—strange alien creatures that attack our world through distortions in space. Tragedy has always haunted Ryouma, and when his high school comes under alien attack, he figures it's just the latest chapter in a long history of suffering. Yet beneath the monster's deadly glare, a strange professor steps forth with an offer of power. Ryouma is touched by the Getter Rays, a mysterious cosmic force that grants the power to pilot the ultimate fighting machine: Getter Robo! (Source: Seven Seas Entertainment) Note: This is a full remake of the original Getter Robo series and the ​sequel to the Getter Robo Saga. Includes a prologue that was published in the October 2015 issue of Bessatsu Shounen Champion but not present in the volume release.

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)