The energy reactor that once generated vast amounts of energy supplied to various facilities was immersed because of the attack by Bydo, and finally falls into the nest of a group of deformed creatures. Deformed aquatic creatures appear one after another to draw the fighters into the world of darkness.
Deformation is the second stage of R-Type Delta. This stage is full of aquatic Bydo in it. The bosses of this stage are Dust Nate Cocoon & Dust Nate Worm.