The Galaxy of Abyss is the final stage of R-Type III. It consists of a warped section of space and the internals of a verylarge Bydo. The stage phases in and out of each location, jumping to different places in the stage. One of the notable mechanics of this area is a small "hole" into the Bydo Dimension, which periodically spews out enemies. Once the boss of this stage is defeated, the hole tears open and the pilot enters the Bydo Dimension itself. It is nothing but red space and the Mother Bydo attached to a wall. Once the Mother Bydo is defeated, it will pursue the pilot as the hole collapses, sealing it inside.
- Before the events of The Third Lightning, this stage resembled a human world in disaster, as seen in R-Type Delta.