Mastic Scum are one of Austria's most internationally recognized extreme metal bands, a brutal death metal and grindcore outfit from Salzburg founded in 1992 by Harry Gandler, Man Gandler, and Linga Moser. Their sound is defined by machine-precise rhythms, dissonant riffing, and a vocal onslaught spanning guttural lows to harsh highs, and they have released six studio albums including 'ICON' on MDD Records in 2022. A seventh album is currently in production as of 2026.

Burial Hordes is an Athens-based act that evolved from raw black metal in their early years to a devastating black/death hybrid. The band's transition reflects the broader trajectory of Greek extreme metal toward increasingly savage and uncompromising sounds.

Mea Culpa is a Czech band from the Humpolec/Pelhřimov area, formed in 2011, whose sound evolved from death metal roots into thrash metal and crossover territory. This stylistic shift reflects a restless creative energy that bridges extreme metal's heaviest and most riff-driven subgenres.

Mega Mosh is a thrash metal/crossover band from Bamberg, Germany, active from 1988 to 1992 with a discography including the albums "Fight The Epidemic Prince," "Call To Account," and "A Different Kind Of Meat." Their complete recordings capture a snapshot of late-1980s German thrash and crossover at its most vital.

A southern metal and crossover act from the Silesian city of Katowice, Menthrass has been channeling unexpected swampy grooves into the Polish industrial landscape since 2019. The band pairs American southern metal influence with Polish underground grit.

A thrash metal, crossover, and hardcore punk act from Novosibirsk, Metallization has been delivering aggressive compositions since 2015. The band channels Siberia's largest city's underground energy into fast, genre-crossing metal.

Minkions is a thrash metal and crossover act from Padua, active since 2009. The band delivers high-energy crossover thrash with the irreverent spirit that typifies the genre.

Mitraljez is a thrash metal, crossover, and hardcore punk band from Rijeka, Croatia, formed in 2025. Their Croatian name meaning "machine gun" captures their rapid-fire musical assault.

Mondocane is a crossover/thrash metal act from Catania in Sicily, taking their name from the Italian expression for 'terrible world.' The band delivers fast, aggressive crossover from the shadow of Mount Etna.