Extreme metal is a loosely defined umbrella term for a number of related heavy metal music subgenres that have developed since the early 1980s. It has been defined as a "cluster of metal subgenres characterized by sonic, verbal, and visual transgression", and refers to metal that is harsher, heavier, more aggressive and less commercialized than other subgenres. Extreme metal is generally underground music that values authenticity and strives to remain outside the mainstream. The term usually includes thrash metal, death metal, black metal and doom metal. Some definitions do not recognise doom metal, or consider that only some of its subgenres are extreme. Most extreme metal styles have very fast tempos and originally took inspiration from hardcore punk.
Definitions
"Extreme metal" generally refers to heavy metal that is extreme in terms of its sound, instrumentation, vocals, lyrics, and imagery. Extreme metal usually has heavily distorted guitars, harsh vocals (such as shouting, screaming and death growls), and complex drumming (such as double bass drumming and blast beats). Most extreme metal styles have very fast tempos (usually between 150 and 250 beats per minute). The exception is doom metal, which instead often takes heaviness and slowness to extremes. Most extreme metal eschews conventional melody and verse-chorus-verse song structure. It also tends to omit the blues element of traditional heavy metal. Joel McIver wrote that extreme metal tends to be faster, harsher, heavier or more aggressive than traditional heavy metal.
Extreme metal's lyrics and imagery typically deal with dark themes such as death, killing, war, horror and the occult. They are often anti-Christian and may include references to Satanism or Paganism. A small number of extreme metal bands reference Nazi Germany, for example Slayer and Marduk.
According to ethnographerKeith Kahn-Harris, the defining characteristics of extreme metal are clearly transgressive: the "extreme" traits noted above are all meant to violate or transgress cultural, artistic, social or aesthetic boundaries. Kahn-Harris says that extreme metal can sometimes sound "close to being a formless noise" to the uninitiated listener.
In general, extreme metal strives to remain inaccessible and unpalatable to 'mainstream' audiences. It is largely based around independent record labels and grassroots promotion. In most of the world, extreme metal does not receive much radio-play or achieve high chart positions.
The first thrash metal bands were inspired by the likes of Venom, Motörhead, the new wave of British heavy metal and hardcore punk. In 1983, Metallica released their debut album Kill 'Em All, which is seen as the first thrash metal record, and would eventually be certified triple platinum. A few months later, Slayer released their own thrash metal album Show No Mercy. These were "landmark releases characterized by speed, aggression, and an austere seriousness". Thrash was often called "speed metal" in the early 1980s, before the two terms became more defined.
Swedish band Bathory have been described as "the biggest inspiration for the Norwegian black metal movement of the early nineties". Their songs first appeared on the compilation Scandinavian Metal Attack in March 1984. Bathory's first and second albums respectively influenced black metal and death metal. Frontman Quorthon pioneered the shrieked vocals that later came to define black metal.
Swiss band Hellhammer made "truly raw and brutal music" which likewise influenced both black and death metal. They released three demos, and an EP in April 1984. Hellhammer then transformed into Celtic Frost and released their first album Morbid Tales that October. Celtic Frost were a major influence on all styles of extreme metal.
In the United States, death metal was pioneered by the bands Possessed and Death. Possessed released the demo Death Metal in 1984 and their first record Seven Churches in November 1985. They have been described by music journalists and musicians as being "monumental" in developing the death metal style, or as being the first death metal band. Death also released a demo Death by Metal (under the name Mantas) in 1984. The band made a major impact in the emerging Florida death metal scene, and frontman Chuck Schuldiner has been credited as the "Father of Death Metal". Their debut album, Scream Bloody Gore (1987), has been described as "the first true death metal record".
The front cover of the Sarcófago's 1987 debut album, I.N.R.I., was a major influence on black metal's corpse paint style make-up. That record is also considered one of the first-wave black metal albums that helped shape the genre. Their second album, The Laws of Scourge, was one of the first technical death metal records to be released.
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↑Ravy, Tawnya; Forcier, Eric (June 2014). Words, Worlds and Narratives: Transmedia and Immersion. Inter-Disciplinary Press. p.147. Extreme metal music is a subgenre extension of the overarching heavy metal umbrella and genres such as death, black, thrash, and grindcore metal define this more obscure form of heavy metal
↑Sellheim, Nikolas (July 2018). Norwegian Native Art. Cultural identity in Norwegian metal music. Cambridge University Press. pp.297–298. The extreme metal genre, containing the subgenres thrash, death and black metal, developed out of the fragmentation of heavy metal music into various different musical styles during the 1980s
↑Anselmi, J.J. (2020). Doomed to Fail. Rare Bird. p.108. [Cathedral] helped doom branch further away from hard rock and evolve into its own facet of extreme metal
↑Hagen, Ross; Barratt-Peacock, Ruth, eds. (6 September 2019). Medievalism and Metal Music Studies. Emerald Publishing Limited. p.216. ISBN9781787563971.
↑Prown, Pete; Newquist, Harvey P. (1997). "Chapter Thirty-three: Industrial and Grindcore". Legends of Rock Guitar: The Essential Reference of Rock's Greatest Guitarists. Hal Leonard Corporation. p.249. ISBN978-0793540426.
↑Trapp, Philip (8 January 2024). "Is metalcore metal?". Loudwire. Retrieved 23 November 2025. It's a question that's been around for roughly as long as metalcore, the fusion genre that melds elements of hardcore punk and extreme metal, has existed itself.
↑Blum, Jordan (19 November 2021). "The 'Big 4′ Bands of 17 Metal Subgenres". Loudwire. Retrieved 23 November 2025. Metalcore at its core – no pun intended – it's a fusion of extreme metal and hardcore punk that truly kicked off in the mid-1990s in the United States.
↑Henderson, Alex. "Desolation of Eden". AllMusic. Archived from the original on 16 August 2018. Retrieved 26 June 2015. Deathcore -- the type of noisy, caustic, abrasive mixture of metalcore and death metal that Chelsea Grin offer on their first full-length album, Desolation of Eden -- is bound to annoy a lot of parents, which is exactly the point."
↑Heaney, George. "Ghost Town – The After Party". AllMusic. Archived from the original on 17 November 2015. Retrieved 22 October 2015. most electronicore is essentially metalcore with some synths tacked on for good measure
↑Harris, Chris (8 July 2021). "Bury Tomorrow Name the Metalcore Trends That Aged Poorly". Loudwire. Retrieved 17 June 2025. "We're not trying to be the next big thing, we're trying to be the next big thing for us." – Daniel Winter-Bates
↑"Album Review: Phinehas – Till the End". New Noise Magazine. Retrieved 17 June 2025. A ferocious mix of melodic metalcore and spiritual themes, *Till the End* cements Phinehas as one of the genre's most heartfelt and technically skilled acts.
↑Cosmo Lee. "Stylus magazine review". Stylus Magazine. Archived from the original on 17 June 2008. Retrieved 18 July 2008. "Death 'n' roll" arose with Entombed's 1993 album Wolverine Blues ... Wolverine Blues was like '70s hard rock tuned down and run through massive distortion and death growls.
↑Janosik, MaryAnn (2006). The Greenwood Encyclopedia of Rock History: The video generation, 1981-1990. Greenwood Press. p.231. Heavy hardcore was considered hardcore based more in metal, adding heavier thrash metal riff stylings
↑Stuart Maconie (24 May 2020). "Dungeon Synth". BBC Radio 6 Music. Retrieved 24 May 2020.
↑Prato, Greg (16 September 2014). Primus, Over the Electric Grapevine: Insight into Primus and the World of Les Claypool. Akashic Books. ISBN978-1-61775-322-0.
↑Christe (2003), Sound of the Beast, p.264, As close to death metal as any other gold-selling record before it, Chaos A.D. stripped down Sepultura's sound into a coarse metallic loop. The CD sold half a million copies, and alongside Pantera the band forged a streetwise, death-derived groove metal that inspired an upcoming generation of mavens in the 1990s.
↑"Sludge Metal: Doom's Filthier Sibling". 5 October 2017. Retrieved 27 May 2018. The sound of sludge has gone pop a couple times, first when mixed with alternative rock by Nirvana, Soundgarden, and other grunge acts in the early '90s,