The R-Type Dimensions EX game is set in a sci-fi world where players take control of the R-type units to fight against an alien threat. The story follows three pilots - Dot, Axl, and Kit - as they battle their way through space to stop the alien invasion.
The gameplay involves shooting enemies and dodging laser beams while navigating through levels set on various planets. Players can choose between different ships with unique abilities and upgrade them using collected parts. The game features challenging level design and a variety of enemy types, requiring players to use strategy and quick reflexes to succeed.