Marobaki is a progressive metalcore band from Edinburgh, Scotland, formed in 2018. They push metalcore into progressive territory with intricate compositions.

Marod is an atmospheric sludge/post-metal band from Leipzig, Germany, whose motto "Marod ist unsere Freiheit. Marod oder tot" signals their uncompromising approach. Their discography of 7-inches, EPs, and the LP "Kulik" delivers crushing post-metal heaviness with a punk-rooted DIY ethos.

Marodium is a thrash metal band from Holbæk, Denmark, active since 2001. With over two decades in the Danish thrash scene, they deliver aggressive, riff-driven thrash metal with seasoned consistency.

Maronni is an experimental project from Sicily, Italy, dealing in what they call 'Sicilian blasphemy and grotesque.' Their releases include a 2013 self-titled single and the album 'Inferno Meridionale,' embracing provocative, unconventional sonic territory rooted in Sicilian cultural expression.

Marooned is a death-thrash metal band from Wollerau, Switzerland, formed in 2013 that fuses the technical aggression of thrash with the heaviness and guttural vocal approach of death metal. Their sound draws on the rich tradition of Swiss extreme metal while carving out their own space within the country's underground scene.

Marquis Amon is a UK-based black metal project formed in 2024, drawing its name from the Goetic demon tradition. The project delivers orthodox black metal steeped in occult themes and ritual atmosphere.

Marquis de Sade is a NWOBHM-inspired heavy metal band from London, England, formed in 2023. They channel the spirit of the New Wave of British Heavy Metal through classic-styled compositions.

Marrasaika is a black metal band from Turku, Finland, formed in 2016. They channel cold Finnish black metal darkness from the southwestern coast.

Marraskuulta is a raw black metal band from Saxony, Germany, whose 2023 four-track demo channels the ferocity of 1990s black metal with song titles spanning English, Russian, and Latin. Their rough, intense approach to the genre draws from the second-wave tradition while emerging from the eastern German underground.