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.

Alkahest was an atmospheric black metal project from Minas Gerais, Brazil, active from 2011 until their split-up. Operating in the same rich Minas Gerais underground that produced seminal Brazilian extreme metal acts, the project explored atmospheric and ambient-influenced black metal with themes rooted in occultism, ritual, and the spiritual — a direction consistent with the atmospheric black metal current emerging across Brazil in the early 2010s. The band remained unsigned throughout their existence.

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 Belong to Us is a metalcore band from Santa Cruz de la Sierra, Bolivia, whose lineup has included vocalists, dual guitarists, bass, and drums across their recorded output. They have released the EP First of All, the single Inmortalized, and the full-length Before the Darkness Comes, establishing themselves as one of the few metalcore acts in the Bolivian underground scene.

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.