Anátema was a black/doom metal band from Campina Grande, Paraíba, Brazil, formed in 2021. The band combined the desolate atmosphere of black metal with the slow, crushing weight of doom metal, drawing from a region of Brazil with a small but growing extreme metal underground before splitting up.

Aonikenk is a speed metal band from Plaza Huincul, Neuquén, taking their name from the Tehuelche word for "people from the south" in a nod to their Patagonian roots. The band built a catalog of heavy metal albums with socially conscious and nativist themes, including "Sentir Metalero" (2001) and "A Mi Argentina" (2005), the latter released on Icarus Music. Members Daniel Carrasco, Ariel Basualto, and Juanchy Basualto drove the band's distinctly Argentine sound throughout their run.

Aorta was a melodic heavy metal band from the Buenos Aires area who released three studio albums — "Desde el Infierno," "Esclavo de tu castigo" (2005, featuring a guest appearance by Claudio Marciello of Almafuerte), and "Sin temor a continuar" (2009) — on the Del Imaginario Discos label. The band's most notable live milestone came in 2009 when they opened for Motörhead. They eventually disbanded, leaving behind a solid catalog within Argentina's traditional heavy metal scene.

Death metal band from Timóteo, Minas Gerais, active from 2018 until their split-up in 2025. They released material through the independent label Digital Yourself and built a small but dedicated following on Spotify, playing straightforward death metal rooted in the Brazilian underground tradition of their home state.

Groove and thrash metal band from Brasília with horror-themed lyrics drawn from slasher films, zombies, and Lovecraftian mythology. Their sound draws from 1980s thrash metal and 1990s stoner and sludge, resulting in an eclectic heaviness reflected in releases such as "Grooves From the Grave: Mutants, Slashers, Zombies and Enraged Lovecraftian Deities." The band was active until their split-up and self-released their catalog on Bandcamp.

Progressive metal and rock band from Ouro Branco, Minas Gerais, formed in 2001 with Christian lyrical themes. The quartet — featuring Ricardo d'Toledo on keyboards and vocals, Isaque Soares on guitar and bass, Euler Fabrine on guitar, and Delias Junior on drums — released two full-lengths: "Without Electrons" (2002) and "Wrong Way" (2003, reissued 2014), both self-produced works showcasing intricate instrumentation.

Aphangak is a Melodic Black/Gothic Metal band from Marinilla, Antioquia, Colombia, active since 2001. The band has released five full-length albums, beginning with Shadows of Death in 2003 and most recently Memorias de un territorio ancestral in 2023, and have appeared on multiple Colombian metal compilations through labels including Manitú Records.

Brazilian extreme progressive metal band active since 2018, combining the technical complexity of progressive metal with the aggression of extreme subgenres. Operating largely under the radar of major metal press, they maintain their output on Bandcamp as part of the growing underground progressive extreme metal scene in Brazil.

Black and death metal band from Salvador, Bahia, active from 2014, fusing black metal and death metal with crust, punk, and grindcore influences. Their 2018 album "O Grotesco e o Desespero," released on Cospe Fogo Gravações and recorded at Estúdio Ruído Rosa in Salvador, explores themes of despair, resistance, and societal decay across ten tracks. The band also released the split "Aphorism / Rabujos" and the EP "I" (2014), making them one of the more prolific underground extreme acts to emerge from northeastern Brazil.