Supersonic and Demonic Relics is a compilation album by Mötley Crüe. It was released in 1999 on Mötley Records. The album is a collection of unreleased tracks as well as rare material, including songs from the limited edition Quaternary EP, Decade of Decadence, demos, and live tunes.
The compilation features the songs "Primal Scream", "Angela" and "Anarchy in the U.K.", which were all originally recorded specifically for the group's first compilation album Decade of Decadence in 1991. The cover song "Teaser", was also issued first on the "Make A Difference Foundation*Stairway To Heaven/Highway To Hell" CD compilation in 1989 & then in 1991 on the Decade of Decadence album CD & was released as a single for this album. It charted at number 35 on the Mainstream rock charts.