Iotunn is a progressive metal band from Copenhagen, Denmark, active since 2016, evolving from progressive power metal toward progressive melodic death metal. The band's name — the Norse word for "giant" — reflects their ambitious, larger-than-life approach to heavy music.

Iperyt is a industrial death/black metal act from Katowice, Poland, active since 2022 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.

Ira Tenax is a death/heavy metal band from the Hanau/Frankfurt area of Germany, formed in 2024, merging the guttural intensity of death metal with the riff-driven power of traditional heavy metal. The band delivers a potent hybrid from the Rhine-Main metropolis.

Irate Architect is a technical death metal/grindcore band from Wedel, Germany, active since 2005, delivering two decades of precision-engineered extremity from the Hamburg outskirts. The band channels intricate technical death metal structures through grindcore's explosive energy.

Iraventus is a melodic doom/death metal act from Saint Petersburg, Russia, active since 2017 and merging death metal's ferocity with doom's oppressive weight. The project inhabits the crushing intersection where both genres converge.

Irem is a black/death metal band from Halle an der Saale, Germany, active since 2006, forging nearly two decades of dual-genre extremity from the Saxon city on the Saale River. The band merges black metal's frozen atmosphere with death metal's crushing weight.

Ireosis are a progressive, groove, and death metal band from Leeds, England, formed in 2025. Their debut EP Dark Matter delivers five tracks of heavy metal incorporating melodic and progressive elements.

Irgalom is a black/death/doom metal act from Budapest, Hungary, active since 2018 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.

Iria is a black/death metal act from Prešov, Slovakia, active since 2012 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.