Rez is a musical rail shooter developed by United Game Artists and published by Sega. Inspired by the work of Russian painter, Wassily Kandinsky, the game was developed under the working title K-Project, and was conceptualized and produced by Tetsuya Mizuguchi. Rez is notable for replacing the typical sound effects found in most rail shooters with electronic music. The player creates sounds and melodies as they target and destroy foes in the game, leading to a form of synesthesia.