Insanity Reigns Supreme is a doom/death metal band from Opglabbeek, Belgium, active since 1993, self-described as a "cult of doom." Across a discography spanning Our Path Is Dark and Lonely through Unorthodox, the band has spent three decades forging crushing, ritualistic doom-death that ranks among Belgium's most enduring extreme metal legacies.

Insatiable is a doom/death metal act from Erica, Netherlands, active since 2018 and merging death metal's ferocity with doom's oppressive weight. The project inhabits the crushing intersection where both genres converge.

Insect Inside is a slam/brutal death metal/deathcore band from Chelyabinsk/Zlatoust, Russia, active since 2019 and dealing in the most extreme and guttural forms of death metal. The project channels punishing brutality with unrelenting intensity.

Insected is a brutal death metal band from Athens, Greece, active since 2005 and dealing in the most extreme and guttural forms of death metal. The project channels punishing brutality with unrelenting intensity.

Brutal death metal band from Rennes in Brittany, active since 2017. Their provocative name channels extreme brutality from the Breton capital.

Inseminator is a blackened death/thrash metal act from Bochnia, Poland, active since 2024 and merging the atmospheric darkness of black metal with death metal's crushing brutality. The project delivers fierce extremity at the crossroads of both genres.

Death/thrash metal band from Fourmies in the Aisne/Nord border area, active since 2013. Their sci-fi name channels death/thrash from the rural Thiérache region.

Death metal/grindcore/hardcore band from Poitiers in western France, active since 2018. Their three-genre fusion delivers aggressive extremity from the historic Vienne capital.

Melodic death metal and metalcore band from Madrid, Spain active since 2015. Their sound blends Gothenburg-style melodeath with metalcore breakdowns from the Spanish capital.