Massue is a sludge and doom metal band from Rouen, France, formed in 2025. Their French name meaning "mace" captures the blunt, crushing force of their doom-sludge assault.

Mastabah is a brutal death/black metal band from Gdańsk, Poland, formed in 2015. They forge extreme metal at the fierce intersection of black and death metal.

Mastdarm is a DSBM (depressive suicidal black metal) duo from Saxony, Germany, formed in 2019 by vocalist Sykdom and guitarist Krankus. Their releases "Crown of Thorns" and "Burn Kill Destroy" channel the anguished, harrowing atmosphere that defines the depressive black metal subgenre.

A death metal act from the northeastern Polish city of Łomża, Mastectomia has been delivering brutal compositions since 2014. The band channels surgical imagery into precise, cutting death metal.

Mastectomy is a brutal death metal band from Poznań, Poland, formed in 2014. They unleash unrelenting brutal death metal fury.

Mastemey is a thrash/groove metal band from Kraków, Poland, formed in 2016. They blend thrash metal's velocity with groove metal's rhythmic punch.

Master Boot Record is an industrial and electronic metal project from Rome, Italy, formed in 2016, blending synthwave and chiptune with metal. They fuse 8-bit aesthetics and electronic production with metal riffs, creating a unique cybernetic sound.

Master Deceiver is a symphonic black metal project from Germany, formed in 2020 to honor the 1990s golden era of the subgenre. Their album "The Shadow Weaver" embraces the atmospheric grandeur and dark romanticism of classic symphonic black metal while deliberately breaking from contemporary mainstream trends.

A thrash metal act from Empoli in the Florence metropolitan area, Master Disaster has been ripping through aggressive compositions since 2019. The band pairs the chaotic energy of their name with tight, disciplined thrash.