Mass Carnage is a brutal death metal band from Trento, Italy. Their 2018 album 'Decaying of Humankind' delivers ten tracks of visceral, aggressive death metal with titles like 'Drilled Skull Forced To Death' and 'Ain't No Mercy (Crush and Dominate),' ranging from short blasts to seven-minute epics.

Mass Casualty Incident is a death metal band from Ammerbuch, Germany, active since 2011 with three releases spanning "A Colony Collapse" through 2018's "Desecrate Your Flesh." Their sound delivers what they call "pure gutwrenching madness," blending melodic death metal sophistication with brutal deathcore aggression across compact, intense releases.

A death metal and grindcore band from Kyustendil, Bulgaria, operating in the extreme underground of the country's metal scene. Documented in the Encyclopaedia Metallum, they represent one of the few grindcore-oriented acts to emerge from the southwestern Bulgarian metal community.

Mass Hypnosis is a band from Zagreb, Croatia, formed in 2014, having evolved from metalcore and melodic death metal into industrial, groove, and nu-metal. Their stylistic evolution reflects an adventurous creative journey across heavy music styles.

Mass Infection is a Greek extreme metal band from Livadia with a catalog including 'Atonement For Iniquity,' 'The Age Of Recreation,' 'For I Am Genocide,' and 'Shadows Became Flesh.' The band maintains an active presence across streaming platforms and their official website massinfection.net.

Mass Madness is a thrash/death metal band from Moscow, Russia, formed in 2011. They forge aggressive extreme metal at the crossroads of death and thrash.

Mass Murder Squad is a black and death metal band from Greece, formed in 2020. They channel violent extremity through the convergence of black and death metal.

Mass of the Heretic is a black/death metal band from Moscow, Russia, formed in 2016. They forge extreme metal at the fierce intersection of black and death metal.

Mass Ritual Murder are a death/black metal band from Austria, formed in 2021 as an independent underground act. The band is registered in the Encyclopaedia Metallum and operates without label affiliation, channelling the raw tradition of extreme metal into their self-produced output. They represent the newer wave of Austrian extreme metal acts building a presence through digital platforms.