Alliance is a progressive power metal band from Fortaleza, Ceará, bringing the melodic ambition of the genre to Brazil's northeast. Formed in 2014, they sit within a tradition of Brazilian power and prog metal acts known for technically ambitious compositions and soaring vocals.

Allmadda is a progressive thrash metal act from Rio de Janeiro whose debut album 'Majestic Sound of the Storm' (2015) weaves macabre keyboard textures through nine densely constructed tracks, some exceeding nine minutes, drawing on both progressive structure and thrash aggression in equal measure.

Allos is a progressive power metal band from Belo Horizonte, Minas Gerais, blending the speed and harmony of power metal with sophisticated prog technique and symphonic elements. Their 2024 album 'Strong Delusion' features guest appearances from Christian Liljegren of Swedish veterans Narnia and Rob Rock of Impellitteri, and was mixed by Thomas 'Plec' Johansson, signaling the band's growing international reach.

Alltorment is a thrash metal band from Goiânia, Goiás, active since 2012 and part of the Central-West Brazilian underground metal scene. They play in the direct, aggressive tradition of Brazilian thrash with limited studio output documented publicly.

Alluring is a solo atmospheric black and doom metal project from Temuco, Chile, active since 2020. The project released its debut demo In the Cold Lips of Eros in 2020, followed by a remastered edition, the EP A Seductive Death, and a 2024 promo titled Kill Me, Alluring Diva. The project's own description centers on themes of "eroticism and agony," placing it within a gothic doom black metal aesthetic uncommon in southern Chile's underground scene.

Alma Matter is a melodic black metal band from Buenos Aires Province, Argentina, with roots going back to 2010 and a renewed phase of activity from 2019 onward. The band has released two volumes of their ongoing series "The Luciferian Tales", which form the backbone of their self-released discography.

Alma Negra is a heavy and thrash metal band from Curitiba, Paraná, formed in 2017. Operating within Curitiba's well-established southern Brazilian metal scene, the band delivers a raw, riff-driven sound rooted in classic thrash and traditional heavy metal.

Alma Siniestra is a thrash metal band from Río Cuarto, in Córdoba Province, formed by guitarist and vocalist Damián González, guitarist Nicolás Ortiz, bassist Luciano Villarreal, and drummer Salvador Velázquez. The band issued the ten-track demo "Origen" in 2012 and followed it with their debut full-length "Violencia extrema", released in January 2016, drawing on influences from Kreator, Sepultura, and Pantera.

Almagor is a death metal band from Maracaibo, Zulia, Venezuela, formed in 2007, playing a brutal style that draws from both death metal and grindcore with Christian lyrical themes. The band released the EP Aborto comun in 2012 and their debut full-length Juzgados in 2014, earning recognition in Venezuela and across Latin America.