Roots of Mushroomhead

Gwar, often stylized as GWAR, is an American heavy metal band formed in Richmond, Virginia, in 1984, composed of and operated by a frequently rotating line-up of musicians, artists, and filmmakers collectively known as Slave Pit Inc.

Slipknot is an American heavy metal band formed in Des Moines, Iowa, in 1995 by percussionist Shawn Crahan, vocalist Anders Colsefni and bassist Paul Gray. After several lineup changes in its early years, the band settled on nine members from 1999 until Gray's death in 2010: Crahan, Gray, Joey Jordison, Craig Jones, Mick Thomson, Corey Taylor, Sid Wilson, Chris Fehn, and Jim Root. Slipknot is well known for its attention-grabbing image, aggressive style of music, and energetic and chaotic live shows.

American Head Charge was a nu metal band from Minneapolis, Minnesota. The band has earned two nominations at the Kerrang! Awards.

Dope is an American industrial metal band from New York City, formed in 1997. The band has released seven full-length studio albums with their most recent studio album, Blood Money Part Zer0, being released in February 2023. The lineup currently consists of founding member and lead singer, rhythm guitarist and keyboardist Edsel Dope, lead guitarist Virus, bassist Acey Slade, and drummer Daniel Fox. As of 2022, they have sold over one million albums worldwide.

Powerman 5000, sometimes abbreviated PM5K, is an American rock band from Boston, Massachusetts. Founded in 1991, the group has released eleven studio albums, gaining its highest level of commercial success with 1999's Tonight the Stars Revolt!, which reached number 29 on the Billboard 200 while spawning the singles "When Worlds Collide" and "Nobody's Real". Frontman Spider One, younger brother of fellow metal musician Rob Zombie, has been the only consistent member of the lineup since the band's formation, and the band has long been known for its variability in sound, taking inspiration from rap-rock in the early nineties, sci-fi and metal at the turn of the millennium, punk/nu-metal and industrial through the 2000s, and electronic rock through the 2010s and 2020s.

Motograter is an American nu metal band formed in Santa Barbara, California in 1995. They are best known for their homemade, namesake instrument, designed with industrial cable and guitar pieces that creates a unique bass sound, and painting themselves in tribal-style body paint for live concerts.

Fantômas is an American experimental metal supergroup formed in 1998 in California. It features vocalist Mike Patton, drummer Dave Lombardo (ex-Slayer), guitarist Buzz Osborne (Melvins) and bassist Trevor Dunn. The band is named after Fantômas, a supervillain featured in a series of crime novels popular in France before World War I and in film, most notably in the '60s French movie series.