Viper recorded their first demo tape in 1985, The Killera Sword, and in 1987, they released their first album, Soldiers of Sunrise — which, despite the simple production and the somewhat flawed English in the lyrics, showcased the degree of talent and skill of the band's members, all of them teenagers at the time.
[citation needed] Not long after that, however, singer Andre Matos left Viper to go to complete his education in music[1] at a University in Germany.
This led to the first major change in the band's style, noticeable in their next album, Evolution, released in 1992 – heavier, more direct, with a more thrash metal sounding.
In 1995, they released their next album, Coma Rage, in which a punk influence is quite strong – as the presence of a cover version of "I Fought the Law" makes very clear.
After a tour in Brazil, Viper went into hiatus again; in February 2010, Bocci announced that, given the band's inactive status, he had left it to work in his solo career.