A São Paulo heavy metal band whose Portuguese-language lyrics confront class struggle, systemic oppression, and social decay with blunt force. Their 2018 physical release ABISMØPORTAL, put out through Shinigami Records, combined the Abismo EP with the subsequently recorded O Portal EP, documenting two distinct phases of the band's evolution.

Minoría Activa is a crossover thrash and hardcore band from Buenos Aires that emerged in 1991 as part of the influential Buenos Aires Hardcore (BxAxHxC) independent movement, with vocalist Esteban "Moncho" Seijo anchoring the band throughout its run. Their discography spans albums including Principio del Fin (2000), Donde Nadie Pertenece (2010), and Híper Mega Mosh (2019), the last recorded at Estudio Monsterland with numerous guest contributors.

Misantropía is a thrash/black metal band from Villa Alemana in the Valparaíso region of Chile. The band's lyrical themes center on misanthropy, anti-Christianity, mythology, and darkness, operating as an independent, unsigned act within the Chilean extreme metal underground.

Monster Mash channel the early German speed/thrash scene — citing Vectom, early Blind Guardian, and Iron Angel as touchstones — with high-energy performances anchored by the versatile vocalist Lion. The band surfaced with the demo He Gambled with Satan and Lost, a three-song statement that mixes traditional and extreme thrash with tight cohesion.

Morbid Devourment are a death/thrash trio from Brasília who consciously root their sound in the primitive filth of early-80s metal, citing Venom, Hellhammer, and Bulldozer as touchstones. Their 2025 debut EP Deathstrike Rebellion packs nine songs into eighteen minutes of raw, occult-themed extremity, following earlier singles that established the band's violent aesthetic.

Morbid Holocaust is a black metal band from Valparaíso, Chile, operating primarily as a one-man project under the name Holocausto. The band released their debut album Atmospheric Armageddon in 2017, recorded at Calaka Records in Valparaíso, and the full-length Conexiones in 2023, the latter tracked between 2021 and 2023 at IIgniter Studios in Limache; they also contributed to the five-band split En el Caos de la Oscuridad alongside Morgue, Kalkü, Beelzebuth, and Ausencia in 2023.

Morbo Chacaleitor is a death/thrash metal band from San Felipe, Chile. The band released two albums in quick succession: Crónicas Macabras in October 2019 and Inconsciente Asesino in September 2020, the latter a six-track record featuring Spanish-language tracks rooted in violent and urban themes.

Mordaza is a death metal band from Acayucan, Veracruz, Mexico, formed in 2015. The band released their debut full-length, El orden del caos, in 2020 on Mexican Steel Prods, following a 2018 demo. A 2022 single, The Dispossessed, marks their most recent recorded output.

Mordrom is a continuation of Crux Cullum, a band that ran from 2007 to 2016 before being resurrected under this name in 2024. The project blends death metal with thrash and black metal undercurrents, channeling themes of occultism, misanthropy, and anti-religion, with the album "Walking to Bloody Death" representing their current direction.