What is Extreme metal?
'''Extreme metal''' describes a mixture of [[heavy metal music]] subgenres formed since the [[1980s]]. Extreme metal is much harsher than other [[Heavy metal music|heavy metal]]. It is also underground, or less commercial. == Types of Extreme Metal == === Main types === * [[Black metal]] ** Ambient black metal ** Symphonic black metal ** War metal<ref name=wbm>Wolf-Rüdiger Mühlmann: ''War Black Metal: Die Extremsten der Extremen''. ''Was bleibt, ist Schutt und Asche''. In: ''Rock Hard'', no. 279, p. 71-73.</ref> * [[Death metal]] ** [[Melodic death metal]] ** [[Technical death metal]] * [[Doom metal]] ** Epic doom ** Funeral doom ** Traditional doom<ref>{{cite web |author=Hayes, Craig |title=Pallbearer - Sorrow And Extinction Review |url=http://heavymetal.about.com/od/pallbearer/fr/Pallbearer-Sorrow-And-Extinction-Review.htm |publisher=[[About.com]] |accessdate=15 March 2012 |archive-date=13 February 2012 |archive-url=https://web.archive.org/web/20120213062413/http://heavymetal.about.com/od/pallbearer/fr/Pallbearer-Sorrow-And-Extinction-Review.htm |url-status=dead }}</ref> * [[Speed metal]] * [[Thrash metal]] === Fusions with other genres === * Black-doom<ref>{{cite web |author=Newshound, Terrorizer |title=''ITALIAN BLACKENED DOOMSTERS FORGOTTEN TOMB PLAN RELEASE'' review |url=http://truecultheavymetal.com/blog1.php/2010/09/23/italian-blackened-doomsters-forbidden-tomb-plan-release |publisher=[[Terrorizer (magazine)#Terrorizer Online|Terrorizer Online]] |accessdate=29 January 2009 |archive-date=23 June 2012 |archive-url=https://www.webcitation.org/68d2oTT9f?url=http://www.terrorizer.com/blog1.php/2010/09/23/italian-blackened-doomsters-forbidden-tomb-plan-release |url-status=dead }}</ref><ref>{{cite web |author=Marsicano, Dan |title=''Ordo Obsidium - Orbis Tertius Review'' review |url=http://heavymetal.about.com/od/ordoobsidium/fr/Ordo-Obsidium-Orbis-Tertius-Review.htm |publisher=[[About.com]] |accessdate=29 January 2012 |archive-date=23 June 2012 |archive-url=https://www.webcitation.org/68d2q7uOw?url=http://h