Aka Funeral is a black metal band from Belo Horizonte founded in 2014, centering their work on Luciferian Gnosis, occultism, and philosophy. Their debut album "Stormy Tide" (2016) was recorded at Riff Studio with a logo designed by Christophe Szpajdel, and they followed it with the full-length "The Endless Eye" (2019) released through Songs for Satan on a limited pressing of 500 copies.

Akaamelda is a one-man melodic death metal project from Buenos Aires, created by Alexey Ermakov, that draws on the classic Scandinavian style of the genre. The debut album Death Equals Relief was released in November 2024, followed by the expanded Epitaph Edition in March 2025, featuring thirteen tracks built around melodic guitar harmonies, heavy riffs, and themes of grief and despair. The project blends melancholic atmosphere with the high-energy drive of early 1990s melodic death metal.

Akallabêth was a folk metal band from Aracaju, Sergipe, whose very name comes from J.R.R. Tolkien's account of the downfall of Númenor — a fitting tribute for a band weaving fantasy-literary themes into their heavy sound. Active in the 2010s before splitting up, they were one of the few extreme metal acts to emerge from Sergipe's underground scene.

Akerbeltz is a black metal band from Contagem/Belo Horizonte, Minas Gerais, formed in the mid-1990s and drawing explicitly on the old-school traditions of Bathory and Hellhammer. They released "Therion Rising" in 1999 on Cogumelo Records — one of Brazil's most storied metal labels — and returned with "Akerbeltz Coven Rising" in 2011, maintaining their Satanic and pagan black metal aesthetic across both records.

Akeronte is a thrash metal band from Haedo, in the Buenos Aires metropolitan area, built around the aggressive, riff-forward sound of classic Bay Area and South American thrash. The band released two EPs early in their career — Mientras los Reyes Ríen in 2009 and Epidemia in 2010 — establishing their place in Argentina's underground thrash scene. The current lineup features Diego Atienza on vocals and guitar, Julian Cortina on guitar, Leandro Lebenas on bass, and Lucas Flores on drums.

Akinetopsia is a brutal death metal trio from São Paulo formed in 2022, consisting of Evandro Miranda (vocals/guitar), Juan Azevedo (bass/vocals), and Daniel Oliveira (drums). Signed to New Standard Elite, their debut full-length "Collapse of Continuum" (2022) drew attention in the international brutal death metal underground for its dense riffing and technical precision, with themes centered on mental illness and alienation.

Akraniuum is a Brazilian death metal and grindcore band active since 1992, making them one of the longer-running acts in Brazil's extreme underground. Their three-decade career places them in the same generational wave as the country's foundational extreme metal groups, combining the blasting brutality of grindcore with the riff structures of death metal.

Akroma is a power metal band from Río Cuarto, in the province of Córdoba, Argentina, active since the mid-2000s in the country's underground metal circuit. The band contributed a cover of "Gates of Babylon" to the Argentine Ronnie James Dio tribute compilation Memento: Homenaje a un Grande in 2012, alongside acts such as Helker and Adrián Barilari. They represent Córdoba's provincial power metal scene, outside the Buenos Aires capital cluster where most Argentine metal activity is concentrated.

Akuma is a pagan black metal band from Votuporanga, São Paulo, formed in 2013. They released the album "For The Beloved Bones" and describe their music with the cryptic motto "We came from the depths," signaling a dark, ritualistic aesthetic rooted in pagan and occult themes. The band operates within the Brazilian underground black metal scene.