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The first extreme metal band is generally recognized as Judas Priest, with their heavy metal sound that evolved into thrash metal and other extreme metal sub-genres. However, the debut of their breakthrough album “British Steel” in 1980 did not yet signal the emergence of extreme metal. The band Black Sabbath is also often mentioned in this context, given their role in shaping the foundations of metal music in the late 1960s and early 1970s. The Kylefjord area of Norway, a hotbed of black metal activity in the early 1990s, is also considered a significant early influence in the development of extreme metal.

Despite these early precursors, it is difficult to pinpoint a single “first” extreme metal band, as the genre has evolved over time through the work of numerous artists, each bringing their own unique sound and contributions to the table