A death metal band from the Tapanã neighborhood who announced themselves with a self-titled EP in 2020, Mandíbula deals in themes of horror, chaos, and human brutality with their sound landing firmly in the old-school tradition. Both 'Self Devourment' and 'Hecatombe Vitae,' released in quick succession in 2024, expanded on that foundation with a focus on psychological as well as physical violence.

Manthra was a thrash/death metal band from Antofagasta, Chile, active from 2001 until their split in 2015. During their run they released two promo CD-Rs — El final (2003) and Inquisición (2004) — and later continued under the name Dark Manthra to distinguish themselves from an older Colombian band named Mantra.

Mar de Grises was formed in Santiago, Chile in 2000, developing a death/doom sound that incorporated post-rock, ambient, and progressive elements into their dense compositional framework. Their debut The Tatterdemalion Express (2004) established them as a significant voice in South American doom, followed by Draining the Waterheart (2008) and Streams Inwards (2010), the latter named the top doom metal album of 2010 by Metal Storm's user base. The band dissolved in 2013 but announced a reunion in 2024, their catalog standing as one of the most ambitious in Latin American extreme metal.

Formed in 2020 by vocalist Yves Schneider, guitarist Israel Bianchi, bassist Dangelis Britto, and drummer Vinicius Brasil, Masennus fuse death metal's density with grindcore's aggression and tackle themes of existentialism, inner struggle, and social decay. Their debut demo "Phobos Terrorizer" and the follow-up "Disturbing Pandemic Incantations" — which includes a caustic cover of Björk's "Human Behaviour" — both appeared within months of the band's formation.

Massakre is a pioneering thrash and death metal band from Santiago, Chile, founded in 1985 by Yanko Tólic, who built the project out of earlier garage bands Sepulcro and Embrión. Influenced by Celtic Frost, Slayer, and Hellhammer, they were among the first speed and thrash metal acts in Chile and Latin America, releasing their debut album Massacre in 1989 and continuing through Psychotic Redemption (2001) and Crematorium (2005). The band is also noted for their early adoption of corpse paint in a thrash metal context, a practice later imitated widely across the scene.

Master Goat play brutal, no-frills death metal out of Campo Grande, trafficking in openly blasphemous imagery as reflected in track titles like Golgota, Cruci-Fiction, and Tormento Infernal. Their approach leans on churning riffs and guttural vocals, drawing from old-school death metal traditions while keeping their sound stripped to the bone.

Masturbator is a death metal band from Franca originally active from 1987 through the mid-1990s, with a 2010 reformation bringing the band back to life. Their 1992 demo 'The Pornographic Terror' documents their early raw death metal approach, and the current lineup — built around vocalist Samuel Death Tormentor, guitarist Sidinei Slaughterman, and bassist Jason Dissector — carries forward the same uncompromising brutality.

Mata Borrão emerged from Belo Horizonte's extreme metal underground as a side project of members from Death Dealer and later Putrifocinctor, delivering a chaotic blend of grindcore and death metal with lyrics targeting social inequality, religious fanaticism, and political alienation. Their 2014 album 'Assim Já Dizia Augusto dos Anjos' — recorded at Studio Attack in Belo Horizonte — stands as their defining statement, with the lineup of Igor Gabriel on vocals, Leandro Alves on guitars, Vitor Malta on bass, and Thiago Pena on drums.

Mathrem is a Death Metal band from Ambato, Tungurahua, Ecuador. Their 2019 release "Profecias y Ruinas" established them as an independent act working within the Ecuadorian underground extreme metal scene. The band operates without label support, self-releasing their material on Bandcamp.