M-Hunter is a progressive death/gothic metal band from Moscow, Russia, formed in 2020. They push death metal into progressive territory with technical ambition.

M.A.C. of Mad is a Prague-based industrial metal act combining hellish female vocals, frantic beats, and brute guitar riffs into a raw digital hardcore assault. Their punk-attitude approach to industrial extremity, heard on releases like "Keep Music Evil," prioritizes abrasive intensity over polish.

A death metal and grindcore act from Ransart in Hainaut, M.A.D. operate in the Belgian underground where the extreme end of the spectrum has historically produced some of Europe's most uncompromising music. The band release material independently through Bandcamp, keeping their output within the no-frills tradition of European death-grind.

M.A.R.T.Y.R. is a doom/death metal band from Supraśl, Poland, formed in 1997. They craft crushing doom-death compositions steeped in oppressive heaviness.

M.D.U. is a grindcore and death metal band from Perpignan, France, formed in 2018. They deliver rapid-fire grindcore-death extremity from the French-Spanish border region.

M.Ire is a band from Bergamo, Italy, formed in 2014, having evolved from black and death metal into heavy metal and rock. Their creative arc traces a shift from extreme origins to classic metal.

M.O.R. Death is a death metal band from Olomouc, Czech Republic, formed in 2018. They deliver straightforward, uncompromising death metal rooted in the genre's classic European traditions with a focus on visceral heaviness.

M:D:A is a melodic death/thrash metal band from the Bünde/Bielefeld area of Germany, formed in 2020. Their sound merges the harmonic sophistication of melodic death metal with the aggressive urgency of thrash, emerging from the North Rhine-Westphalia underground.

Maahlas is a progressive melodic death/black metal band from Oslo, Norway, formed in 2014. They forge extreme metal at the fierce intersection of black and death metal.