"Redemption" is a single released by Gackt on January 25, 2006. It peaked at third place on the Oricon weekly chart and charted for twelve weeks. In 2006, it was the 83rd best selling single with sales of 124,955 copies, making it to be Gackt's eighth best selling single. The "Longing" and "Redemption" were theme songs of the video game Dirge of Cerberus: Final Fantasy VII.
In late 2005 was announced Gackt's involvement with the Final Fantasy VII franchise, for a Square Enix PlayStation 2 video game Dirge of Cerberus, released on January 26, 2006. The character Genesis Rhapsodos was modeled and voiced by him, and was again in 2007 for a video game Crisis Core. Gackt also acted as the character in a briefly appearance during an optional ending of the game.
Besides that, Gackt composed and performed two theme songs for the first game, "Longing" and "Redemption", and were released as a single, separately from the games's original soundtrack, but were included in its release a month later. A limited edition of the single was published as well, containing a DVD with alternating music videos of the title track, one featuring the artist and the other being composed of footage from Dirge of Cerberus.
The "Redemption" was performed on the Diabolos: Aien no Shi tour in 2005, and extensively throughout his solo career.