Radirgy Noa, commonly mistranslated as Radirgy Noir, is a 2009 shoot-'em-up for the Sega NAOMI by Milestone as the sequel to Radirgy. It has since been ported to Wii.

The second game in the Radirgy series follows the original closely. This time original protagonist Shizuru Kamigusa is joined by Ruki Mishima, one of the villains from the previous game, and a two-player mode is added. This game is also played with a horizontally-oriented screen instead of the previous game's vertically-oriented screen.