Nightbreaker is the eighth studio album by American heavy metal band Riot. It was the band's first release with vocalist Mike DiMeo, as well as the studio debut of guitarist Mike Flyntz and bassist Pete Perez. The album was released in Japan by Sony Music in 1993, in Europe by Rising Sun Productions in 1994, and finally re-issued in the United States by Metal Blade Records in 1999, all with different cover artwork. A very limited run of CDs, bearing the Combat Pay Music label and utilizing the Japanese artwork, was also produced in 1993 by the band's management.