Radirgy was part of the "Ultimate Shooting Collection" (Milestone Shooting Collection for Japan) alongside Chaos Field and Karous. It was renamed to Radio Allergy and I really loved it too, even though I´d have to admit that I liked Chaos Field a bit more with its Radiant Silvergun-esque sword mechanic. Why aren´t there any games like this for the DS? Is the audience for them too small?
By the way, RS DS was the main reason I decided to participate here at ds-scene rather than any other scene-related page *looking in retrohead´s direction with a hopeful glimpse in the eye* ;D