Roots of Machine Head

Slayer is an American thrash metal band from Huntington Park, California, formed in 1981 by guitarists Kerry King and Jeff Hanneman, drummer Dave Lombardo and vocalist/bassist Tom Araya. Slayer's fast and aggressive musical style made them one of the "big four" bands of thrash metal, alongside Metallica, Megadeth, and Anthrax. Slayer's current lineup comprises King, Araya, drummer Paul Bostaph, and guitarist Gary Holt, who initially joined as a touring musician in 2011 before joining the band permanently after Hanneman's death in 2013; the drummer Jon Dette is a former member of the band.

Coal Chamber is an American nu metal band formed by Dez Fafara and Meegs Rascón in Los Angeles in 1992, initially under the name She's in Pain. The original lineup also consisted of bassist Rayna Foss and drummer Jon Tor. Mike Cox replaced Tor on drums in 1995, and the Coal Chamber lineup was complete. After signing to Roadrunner Records, they released their debut album, Coal Chamber, in 1997.

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.

Jussi Sydänmaa is a Finnish guitarist and a former founding member of the rock band Lordi, performing by the stage name of Amen until his departure in May 2022.

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.

Lamb of God is an American heavy metal band from Richmond, Virginia. Formed in 1994 as Burn the Priest, the group consists of bassist John Campbell, vocalist Randy Blythe, guitarists Mark Morton and Willie Adler, and drummer Art Cruz. The band is considered a significant member of the new wave of American heavy metal movement.

Gojira is a French heavy metal band from Ondres. Founded as Godzilla in 1996, the band's lineup – brothers Joe and Mario Duplantier (drums), Christian Andreu (guitar), and Jean-Michel Labadie (bass) – has been the same since the band changed its name to Gojira in 2001. Gojira has been known for its progressive and technical death metal styles and lyrics that often feature themes of spirituality, philosophy, and environmentalism. The band has gone "from the utmost obscurity during the first half of their career to widespread global recognition in the second".

Megadeth is an American heavy metal band formed in Los Angeles in 1983 by vocalist and guitarist Dave Mustaine. Known for their technically complex guitar work and musicianship, Megadeth is one of the "big four" of American thrash metal—along with Slayer, Anthrax, and Metallica—and is credited with helping to develop and popularize the genre. Their music features intricate arrangements, fast rhythm sections, dual lead guitars, and lyrical themes such as war, conflicts, politics, religion, death, and personal relationships.

Meshuggah is a Swedish extreme metal band formed in Umeå in 1987. Since 2004, the band's lineup consists of founding members Jens Kidman and Fredrik Thordendal, alongside rhythm guitarist Mårten Hagström, drummer Tomas Haake and bassist Dick Lövgren. Since its formation, the band has released nine studio albums, six EPs and eight music videos. Their latest studio album, Immutable, was released in April 2022 via Atomic Fire Records.

The Halo Effect is a Swedish melodic death metal supergroup formed by former members of In Flames. They are signed to the Nuclear Blast label.

Caliban are a German metalcore band from Essen. To date, they have released thirteen studio albums and two EPs, along with two split albums with Heaven Shall Burn.

Sacred Reich is an American thrash metal band from Phoenix, Arizona, formed in 1985. As of 2025, the band's lineup has consisted of vocalist-bassist Phil Rind, lead guitarist Wiley Arnett, rhythm guitarist Joey Radziwill, and drummer Eduardo Baldo. Former members include rhythm guitarist Jason Rainey, and drummers Greg Hall and Dave McClain. Their music often features mid-tempo song structures as well as musical and lyrical influences from punk rock and hardcore punk, with their lyrics focusing on political and social topics. The band is credited with leading the second wave of thrash metal in the late 1980s.