Machine Kill is a death metal act from the Cornish town of Redruth, delivering aggressive extremity from one of England's most remote corners. Active since 2014, the band channels the industrial mining heritage of Cornwall into crushing riffs.

Machine Men formed in Suolahti, Finland in 1998, originating as an Iron Maiden cover band before developing their own melodic heavy metal identity. The band released three full-length albums—Scars & Wounds (2003), Elegies (2005), and Circus of Fools (2007)—with the single 'Falling' from Elegies charting at number five on the Finnish charts. The band dissolved in February 2011 following declining interest among members, leaving behind a compact catalog that demonstrated Finland's capacity for traditional NWOBHM-influenced heavy metal beyond its better-known power metal exports.

Machine Messiah is a band from Florence, Italy, active since 2004, having evolved from heavy and power metal into hard rock. Their creative journey spans two decades of musical evolution.

Machtklang is a one-woman extreme metal project from Munich, Germany, led by Christina "Herrin" who handles all instruments and vocals. Born from the project formerly known as Finsterort, the self-titled 2024 debut channels anti-religious fury through a fusion of black metal, death metal, and doom, driven by the artist's mission to empower critical thinking against religious institutional abuse.

Machukha is a Berlin-based band whose name means "stepmother" in Ukrainian, blending post-black metal, dark hardcore, and punk with a mission to express shared experiences of retaining humanity in a harsh world. Their 2024 album "Mochari" and surrounding singles feature a multinational lineup including Ukrainian vocalist Natalya and saxophonist/bassist Mykola.

Maciej Podsiadło is a heavy metal/hard rock (early); heavy/power metal (later) band from Szczecin, Poland, formed in 2014. They deliver soaring power metal driven by melodic hooks and anthemic performances.

Mackage is a slam and brutal death metal band from Shropshire, England, formed in 2016. They unleash crushing slam death metal built on guttural brutality.

Macrohard are a death/thrash metal band from Wels in Upper Austria, operating in the underground of the Austrian extreme metal scene. The band released music through their Bandcamp page and draw on the aggressive, riff-driven traditions of early European death and thrash metal. They remain one of the lesser-documented but active acts in the regional scene.

Mactätus was a black metal band from Skien in Telemark, operating in the Norwegian underground since the late 1990s. The band contributed to the second wave of Norwegian black metal with their atmospheric, keyboard-enhanced compositions.