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.

Alchimist is a progressive power metal band from São Luís, Maranhão, originally founded in 2014 with roots in classic acts like Iron Maiden and Judas Priest before developing an aggressive, technical sound drawing from Symphony X, Dream Theater, and Angra. The band released their debut EP "The Wisher" in 2016, featuring five tracks including the single "Beyond Darkness," and went on to perform at local shows in Maranhão's growing metal scene.

Alcohelldrugs is a raw speed/thrash and metal-punk duo from Vitória de Santo Antão, Pernambuco, formed in 2018 by brothers Thiago Xaruto and Henrique Alcoholic out of the northeastern Brazilian underground. The band released the EP "Never Stop the Madness" and the split "Hellish Alcoholic Attack" with Burial Ground, as well as the 2020 album "Infernal Metal Punk" through Murder Records, playing chaotic, lo-fi thrash punk in the tradition of Brazilian and international extremity.

Alcoholic Rites are a thrash metal band from San Vicente de Tagua Tagua, in Chile's O'Higgins region, who have been active since the early 2010s. Their discography includes the albums Alkomanifesto (2010) and Fermented in Hell (2013), along with the 2016 split Drunk and in Charge with Lustrum on the Eternal Death label, and Rope of the Spirits (2022). The band's self-described "Alcoholic Dirty Heavy Thrash Metal of War" sound is rooted in old-school thrash with lyrics written entirely in Spanish.

Alcoholic Vortex is a thrash metal band from Brasília that has distinguished itself with a sci-fi concept running across their releases: their albums follow Warren Jackson, a headbanger abducted and drawn into an intergalactic war, forming a serialized thrash opera. The band's "Space Traumas" series — Part I: "The Alcoholic Menace" and Part II: "Attack of the Yarells" — delivered fast, aggressive riffing with high-energy solos and earned praise in both Brazilian and international metal media.