Crimson

Crimson is the fifth full-length studio album by Swedish death metal band Edge of Sanity, which is their first concept album and was released in 1996 by Black Mark Productions. It features a single 40-minute track, telling a story in the distant future, when human civilization is about to end.
The album, which features Opeth frontman Mikael Åkerfeldt, received substantial critical acclaim, and is considered by most fans to be Edge of Sanity's finest achievement. A sequel, Crimson II, was released in 2003 and picks up directly where the first album left off. Both albums were remixed and slightly edited for release on the 2006 compilation When All is Said.