Instead, it only played during the first and second phases of the Sundowner battle, with an entirely different song playing for the Slider phase of the battle. Red Sun is one of the few boss themes to not play throughout the duration of the battle. In fact, before reaching Sundowner, Raiden had to go through a Japanese garden typical of samurai stories. The 'red sun' would mean a new dawn of drastic changes, humans contaminating the beautiful 'paradise,' or the world. In addition, it also explores Sundowner's personal philosophy of how humans are naturally violent, and that by stimulating war, humans are returning to their 'natural state.' The term 'Red Sun over paradise,' in Japanese culture, references a bloodstained night after a war, but changing the bloody moon into a red sun. The lyrics describe the technological and visual transformation of the environment suffered by the exploitation of natural resources and contamination by humans in order to obtain more and more. ' Red Sun' is the boss theme for Sundowner in Metal Gear Rising: Revengeance.