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 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.

Alcoholocausto is a thrash metal band from Recife, Pernambuco, formed in 2019 and operating under the "Brigada Anti Posers" banner, signaling an old-school, anti-trend ethos rooted in the Brazilian thrash tradition. Their sound embraces satanic and war-themed thrash in the vein of the classic Recife underground, releasing material independently and building a local following in the northeastern Brazilian metal scene.

Alcoólica was a thrash metal band from Santos, São Paulo, formed in 2013 and part of the port city's underground metal scene alongside acts like Chemical Disaster. The band released sessions through their Bandcamp page before eventually splitting up, representing Santos's contribution to the broader São Paulo state thrash underground.

Aleacion was a heavy metal band from San Juan, Argentina, active through the 1990s under the name Cromagnon before adopting the Aleacion name. The band released the EP "El combatiente" in 1995 and documented their live performances on the 1996 release "Vivos en el Auditorio Juan Victoria".

Alekto is a death/groove metal band from São Paulo, Brazil, formed in 2014 and active in the city's underground extreme metal circuit. The band combines the heaviness of Brazilian death metal with the mid-paced rhythmic punch of groove metal, drawing on a tradition that runs deep in São Paulo's metal scene. They have an online presence at alektometal.com and maintain an active following within Brazil's groove and death metal communities.