Alien's Purger is a grindcore/death metal band from Ouro Branco, Minas Gerais, Brazil, formed in May 2021 by guitarist Marcão Mamute, vocalist Daniel Índio, and drummer Ildegrind. Their debut full-length "The Korotian's Saga" (2023), released via The Hills Are Dead Records, is a 20-track, 25-minute concept album built around the band's signature themes of aliens and cigars — absurdist subject matter delivered with blasting, no-frills grindcore brutality. The record was engineered and mixed by Bruno Bassani, who also contributed additional instrumentation to the recording.

Alienist is a technical death metal band from Buenos Aires formed in 2025, featuring guitarists Agustín Orzabal and Enzo Mauas alongside bassist Guido Benvenuti, vocalist Alex Labarba, and drummer Gerardo Herrera. Their debut EP "Introspectio, Sui Exitium", released in October 2025, is a six-track, 28-minute self-released work drawing comparisons to neoclassical tech-death acts for its fretless bass, dense twin-guitar harmonies, and Latin-titled compositions.

Aliquid is a progressive/power metal band from Aracaju, Sergipe, Brazil, formed in 2011 and active in the northeastern Brazilian underground metal scene. Playing in a genre dominated by bands from the south and southeast, Aliquid brings melodic progressive metal with power metal dynamics to a region less commonly represented in Brazilian metal discourse. The band is unsigned and independent, releasing music through Bandcamp.

Aliwen is a melodic metalcore band from Quilmes, in the Buenos Aires metropolitan area, formed in 2016. The band self-released an EP in 2017 under their own name, establishing themselves as an independent act within Argentina's growing metalcore scene.

Alkimistal is a São Paulo-based metal act working the intersection of melodic death metal, thrash, and metalcore. Their Bandcamp release 'Reflections' showcases the blend of harsh riffing and melodic hooks that defines their sound within São Paulo's underground scene.

Alkymenia is a thrash metal band from Caruaru, Pernambuco, formed by three brothers — Sandro Silva, Lalo, and Dennis — who have built one of the most consistent careers in the northeastern Brazilian underground. Their 2023 album 'Meeting Before the Death' was recorded with producer Tue Madsen (Meshuggah, Behemoth) at Antfarm Studio in Denmark, and the band has toured Europe across 12 shows in 8 countries.

All I Hate is a death metal duo from Sorocaba, São Paulo state, composed of Lucas Berti and Elcio Junior. Since forming in 2021 they have been remarkably prolific, releasing multiple records including 'Soulless Gods Arise', 'Manifesto', and 'Circus', carving out a stripped-down, punishing approach to the genre.

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.