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.

Movarbru are a long-running Satanic black metal band from Sapiranga, Rio Grande do Sul, whose sound draws from the raw South American underground tradition. Their 2020 EP 'Sob o Domínio do Antigo Culto,' recorded at From Hellcords Studios in Porto Alegre, was released as a 300-copy limited edition through Cianeto Discos and features the band's core themes of occultism and anti-Christian fury.

Mr. Ego are a power and progressive metal band founded by brothers Júlio (vocals) and Paulo André (bass), drawing from Helloween, Angra, Dream Theater, and Symphony X. Their 2009 album 'Mythology' is a concept record built entirely around ancient Greek mythology, and their subsequent release 'Se7en' features Symphony X bassist Mike LePond as a guest on one of its tracks.

A shred-focused heavy metal outfit from the port city of Santos, Mr. Green traded in technically demanding guitar work within a classic heavy metal framework. The band operated as an independent act and left behind an instrumental-leaning legacy before splitting up.

Mud Crows is a post-metal band from Adrogué, Buenos Aires, Argentina, comprising Mariano Nunes (vocals), Julian Nunes (guitar), Rodrigo Mendoza (bass), and Gustavo Liberzone (drums). They released the album Nacimiento de un Ser in 2018, recorded at Rockville Studios in Banfield, and followed it with the Rulieh EP in 2020.