'''Forbidden Evil''' was formed by drummer Jim Pittman and guitarist Robb Flynn (later of Machine Head). They recorded several demo tapes and appeared on the out-of-print live album Live At Ruthies Inn - The Eastern Front with its original lineup featuring Craig Locicero (guitar), Russ Anderson (vocals), and John Tegio (bass). After Jim Pittman, John Tegio, and Robb Flynn left the band and were replaced by Paul Bostaph (drums), Matt Camacho (bass), and Glen Avelais (guitar), the band's name was changed to simply Forbidden in order to prevent the band from being stereotyped as a black metal band. Forbidden Evil was also the name of their first official album, released in 1988, and features three songs written by Robb Flynn: "Chalice Of Blood", "Forbidden Evil", and "As Good As Dead". The "classic" line-up (until 1989) was Russ Anderson (vocals), Craig Locicero and Glen Alvelais (guitars), Matt Camacho (bass) and Paul Bostaph (drums). In 1989, Glen Alvelais left the band, later to join Testament. He was replaced by Tim Calvert. They released their second studio album Twisted Into Form in 1990.