Motherwood is a two-person atmospheric black metal project built around the guitar, vocals, and songwriting of Guilherme Malosso, with Yuri Camargo providing synthesizers and ambient texture. The project has steadily grown in ambition, moving from the raw introspection of their 2017 self-titled debut through the dense, depression-steeped atmospheres of "Im Zeichen der Dunkelheit" (2023) and "A Fading Elegy" (2024).

Motorbastards are a Motörhead-devoted power trio from Curitiba led by bassist and vocalist Carlão Bastard, whose rumbling low-end and raspy delivery draw unmistakable parallels to Lemmy Kilmister. The band channels classic rock 'n' roll aggression through a speed metal lens, and their debut album of original material, 'Divisão Rock N Roll,' sold its entire limited pressing within a year of release.

Motorcrush play a direct brand of heavy and thrash metal rooted in the classic American acts — Metallica, Megadeth, and Pantera are the most audible touchstones. Their debut demo 'I Control You' introduced the band with six tracks covering themes of war, personal freedom, and societal control.

Motores Malditos draw on the heavy riff traditions of Black Sabbath, Kyuss, and Electric Wizard to build a thick-toned stoner metal sound. The quartet from Formiga, MG has moved quickly, releasing their self-titled debut in late 2023 and following it with the full-length '¡Malditos Motores!' just months later in April 2024.

MotorManiak is a heavy metal band from Bogotá, Colombia, established in 2021. The band plays classic-leaning heavy metal and has released tracks including "Kill the Devil," "Old Times Rock N Roll," "Heavy Cross," and "Omega Riders" through their Bandcamp page. They remain unsigned and active in the Colombian heavy metal underground.

Motra are a death metal band from Sorocaba whose lyrics dig into mental disorders, pain, and psychological collapse. Their 2025 album 'Óbice' — a ten-track statement of unrelenting brutality — earned the band international attention including coverage in Russian metal media.

Mount Depression is a depressive black metal project formed in July 2014 in Posadas, Misiones, Argentina, known for an expansive and experimental discography built across shifting lineups. Their albums include Suffering in Peace (2015), The Dream of the Flesh (2018), and A Lot of Corpses (2021), with early releases distributed internationally by Winterwolf Records in Germany and Depressive Illusions in Ukraine.

Mourners Lament is a death doom band from Viña del Mar, Chile, active since 2004 and recognized as part of the Chilean doom scene alongside Uaral, Mar de Grises, and Poema Arcanus. Their catalog spans four releases — from the debut Unbroken Solemnity (2008) through We All Be Given (2017), released on Hammerheart Records, to A Grey Farewell (2024) — a nearly 65-minute album of crushing riffs, guttural vocals, and atmospheric synths.

Mournful Tears are a black metal act from Guarujá whose lyrical world blends dark poetry, occultism, and metaphorical inner journeys. The band has released material through Occult Moon Records and appeared on a split alongside fellow black metal act Black Angel.