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.

When a technologically advanced civilization rises from the ocean and conventional weapons fail, three pilots are assigned to operate an experimental machine powered by Getter Rays. Their opponents do not rely on force alone. Each battle is designed to disrupt judgment, break coordination, and push them into mistakes made under pressure. Written by Bingo Morihashi and illustrated by Drill Jill, Getter Robo High centers on conflict shaped by uncertainty. Decisions must be made quickly and with incomplete information. Hesitation, misreading an opponent, or acting too aggressively can change the outcome without warning. As the fighting continues, the threat becomes less predictable, and the stakes grow beyond what the pilots expected. The strain of responsibility and isolation begins to affect how they think, how they trust each other, and how much risk they are willing to take. Drawn in dense, high-contrast black and white, the artwork creates a constant sense of compression and urgency, keeping the action close and immediate. In the darker tradition of Getter Robo, escalation comes through sudden reversals and mounting risk. The story focuses on what sustained pressure does to people when every decision carries consequences. 

(Source: Mahjong Pros Publishing)

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)