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.

Akuã is a black metal project from São Paulo formed in 2018, whose name draws from indigenous Brazilian cultural and linguistic heritage — aligning them with a wave of Brazilian acts that channel native spiritual and pagan themes through the black metal form. Operating in the underground since their formation, they are part of São Paulo's diverse and sprawling extreme metal scene.

Alaic is a one-man depressive black metal and ambient project from Vitória da Conquista, Bahia, run solely by the musician known as Putrefactus, who handles all instruments, mixing, and mastering. Active since 2016, the project has produced a substantial catalog including the albums "The Harvest," "Final Embers of Sunlight," and "Overcoming the Existence," as well as split work, exploring themes of despair and inner dissolution characteristic of the Brazilian DSBM scene.

Alakran is a Buenos Aires heavy metal and hard rock band with roots going back to 1982, making them one of Argentina's longest-running acts in the genre. Founded by guitarist Gady Pampillón and vocalist Mario Curcio, the band released albums including Vagabundear and Otra vez en las calles (1991), and has since continued under vocalist Mario Ian through multiple reunion periods. They were part of the wave of Argentine hard rock acts — alongside Kamikaze and Rata Blanca — that defined the sound of the country's metal scene in the late 1980s.

Alaridos are a grindcore band from Santiago, Chile, formed in 2013, with a lineup featuring Daniela on vocals, Erik on drums, Alberto on bass, and Alejandro on guitar. The band has released four recordings: the debut full-length Ciudad Paranoia (2013), Vida Sangre y Dolor (2014), a split with Richard Harrison (2017), and Horca (2021), which was tracked at Lion's Roar Studio in Peñaflor and mixed by Cristian León. Their Bandcamp presence under the tag "Grindcore y Muerte" reflects the band's dual grindcore and death metal influence.

Alavena are a crossover metal band from the Santiago area of Chile, formed in 2013, who blend thrash, speed, death metal, and hardcore influences. Their debut album It Started Here was released on February 1, 2013 through Australis Records, comprising 12 tracks that include both Spanish- and English-language songs such as "Beer Money," "El Terrible," and "Muerto en Dolor." The record is one of the early entries in Chile's crossover thrash scene of that era.

Albatros is a death metal band from San Martín, in the Buenos Aires province of Argentina, with origins tracing back to 1991 and a sustained presence across Argentina's underground extreme metal scene. The band recorded a series of demos across the 1990s and 2000s, including Caminos de Desesperación (1995), Resistir o Morir (1996), and Ni muertos, ni vencidos (2002). The current lineup centers on Fernando Saccarola on vocals and guitar, Maximiliano Salto on drums, and Maximiliano Lescano on bass.