Metal Storm, released by Irem for the Nintendo in 1991, contains a few references to the R-Type universe.
- The boss of level 5, which is a flying ship that changes between red, blue, and green colors, and fires a different weapon accordingly. Naturally, the red form fires a forward laser, and the blue form fires a reflective beam. Green mode takes over for yellow, firing two walls of energy above and below the craft. Written in the background is "R-75".
- The classic Warship from the first R-Type makes an appearance, in a fleet of fellow warships, in the background of the level 6 boss fight.