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.

Albor is a doom metal band from Natal, Rio Grande do Norte, formed in 2014 and active in the northeastern Brazilian underground scene. Their music draws on the slow, heavy, and mournful traditions of the genre, representing a rare outpost of doom metal in a region of Brazil better known for extreme and thrash styles.

Alchemist was a thrash metal band from Porto Alegre, Rio Grande do Sul, formed in 2013 and active in the southern Brazilian underground scene before splitting up. Operating independently, the band released music through their Bandcamp page "alclaboratories" and were part of a thrash revival wave in Porto Alegre, a city with a strong tradition in Brazilian heavy music.

Alchemy is a heavy and doom metal band from Rio de Janeiro, formed in 2020 and currently on hold. Drawing on traditional doom's slow tempos and heavy riffing blended with classic heavy metal songwriting, the band reflects influences from the genre's founding acts while operating independently within Rio de Janeiro's underground metal scene.