Mayday is a progressive groove metal band from Santa Fe, Argentina, built around core members Octavio Sobrero and Joel Dergal (guitar), Lucas Chelini (drums), alongside vocalist Juan Suárez and bassist Juan Fiume. The band recorded their debut EP "Resiliente" at Junín Sessions in Santa Fe, mixing and mastering it with producers in Florida and New York, and released a follow-up EP "Neron" in 2024. Their self-described "Pure Grill Metal" blends heavy riffs with progressive structures and complex rhythmic arrangements.

This Belo Horizonte thrash/death metal band took their first stage alongside Chakal and Aamonhammer at the Black Death Festival in 1987, placing them among the earliest acts in the formative Brazilian extreme metal underground. The band later renamed themselves The Mist in 1988 and continued recording and performing under that name through the 1990s before eventually reviving.

Maze of Madness play straightforward heavy and thrash metal with a raw, stripped-back energy, releasing their debut album "Mass Hatred" in July 2022 shortly after forming. The eight-track record plants the band firmly in the tradition of classic thrash aggression without straying far from the genre's foundational template.

Mazemath is a thrash and death metal band from Santiago, Chile, formed in 2015. Their debut album The Illusion of Freedom, released in 2016 and recorded at AudioCustom Studios in Santiago, introduced the band's aggressive approach to politically and cosmically charged lyrical themes including environmental destruction and political corruption.

Meant to Suffer were a grindcore band whose sound pulled in elements of crust punk, hardcore, and sludge alongside their blasting core. The four-piece — Al on vocals, Louie on guitar, Gus on bass and vocals, and Rod on drums — released "A Step Towards Deception" in 2012 and a self-titled record in 2015 before eventually splitting up.

Mecanica was a thrash metal band from Morón, Buenos Aires, Argentina, formed around guitarist Jorge Moreno alongside vocalist Diego Leguizamón, guitarist Nicolás D'Cristófaro, bassist Luis "Bicho" Medina, and drummer Diego Nuñez. The band recorded their debut album "Códigos de Barrio" between April and August 2018 at Kirkincho Records in Morón, releasing it through Icarus Music in 2019. The nine-track record showcases old-school Argentine thrash, closing with the signature track "Violencia Es Thrash".

A thrash metal outfit from the capital whose self-titled debut was released in 2008 through Thrash Massacre Records as a limited run of 500 copies. Their sound draws on the classic Brazilian and North American thrash traditions, delivering the kind of high-energy, riff-driven attack that the genre demands.

Mediadhor hit the ground running with two releases in quick succession: the demo "Caminho do Arrependimento" in late 2016 and the full-length "Campos Mortais" in early 2017. Their approach fuses the grinding aggression of death metal with thrash's rhythmic momentum, giving the material a relentless, forward-charging quality.

Founded by bassist Samuka as a vehicle for weaving Egyptian history and mythology into power metal, Medjay released their debut "Sandstorm" in November 2020 through Voice Music, followed by "Cleopatra VII" in 2022, produced at Shokran Studios. Their sound incorporates melodic elements drawn from Arabic musical scales alongside driving double-bass rhythms and soaring clean vocals.