The band was formed in 2002 by four guys who had the common goal of making music that would add a new modern layer to the already established Thrash Metal scene.

After a live rehearsal demo (Killer Instinct – 2002), a compilation album (Fast Food Thrash Metal) and plenty of gigs through Distrito Federal (Brazil) and surrounding areas, Violator got the opportunity to travel to Asuncion and play in Paraguay. After that, the band was invited to play as the opening act for German Thrash Metal pioneers, Destruction and American deathers, Malevolent Creation.

In the first months of 2004, the band signed with Kill Again Records label and released an EP called Violent Mosh. The release resulted in over 40 concerts in the next two years. Violator traveled through 10 Brazilian states in the Moshing With Violence Tour. One of these concerts was recorded as a DVD for the first edition of Da Tribo Rock Magazine. Violent Mosh was also the first release by the band to be released outside Brazil. The EP was released on cassette in Bolivia by Grim Art Prods. The cassette was limited to 666 copies. In late 2005, the guitarist Juan Leda, had to leave the band to continue his studies in Argentina, his homeland. The farewell show was with Finnish thrashcore band Força Macabra.

As of early 2006 Violator was functioning as a power trio. After six months of recording and editing at Orbis studio in Brasília, the band came out with the first full-length album, Chemical Assault. The album release was also the return of the two guitar line-up, after Márcio Cambito joined the band. The band continued playing concerts in Brazil and in South America. In 2009 they had the opportunity to play at the True Thrash Fest at Osaka, Japan with Hirax, Fastkill, Abigail, Rose Rose, Riverge, Kings of Evil, Code Red, and Impaler. In 2010, Violator released their album, Annihilation Process, continuing on the typical Old School Thrash Metal style that the group has played since it was formed. That EP was the debut in studio of Marcio Cambito. The group toured Europe in the Plunging Into Annihilation Euro Tour 2010 with the American thrashers, Fueled By Fire. The band also released several splits in 2010, Thrashing The Tyrants with Bandanos, Raging Thrash with Hirax, and True Thrash Fest, a DVD that was recorded during their presentation at the True Thrash Fest 2009, and that also includes songs of the other groups that performed on that year’s fest edition.