Attma is a death and groove metal band from Parnaíba, Piauí, active since 2020 and part of a small but growing extreme metal community in Brazil's northern coast. They blend the rhythmic heaviness of groove metal with death metal extremity, operating independently in a state better known for Teresina's scene than for coastal metal activity.

Attomic Soldier is a thrash metal band from São Paulo, Brazil formed in 2017, carrying forward the city's tradition of aggressive, crossover-flavored thrash. Their 2017 debut album "In Mental Prison" is a nine-track assault covering themes of war, insanity, and darkness, showcasing the raw, high-speed aggression typical of the São Paulo underground scene.

Aume is an atmospheric folk black metal project from Vicuña in Chile's Coquimbo region, created and performed entirely by Averso Yekamush. The project weaves Andean folk traditions into a black metal framework, and their 2020 debut album Fulgor Renegrido — a nine-track record described as a pilgrimage through Chilean earthly and mythological imagery — received a limited cassette release through Ancient Entity Records in the UK.

Aura Ignis — Latin for "Halo of Fire" — is a heavy/power metal band from Tunja, Boyacá, Colombia, with core members Edgar Barrera and Milton Salinas active since the band's founding in 1999. The band released their debut full-length "Prisioneros del dolor" in 2016 and their second album "Marcando tu destino" in 2024, with themes centered on freedom, inner conflict, war, and life. They have operated under several earlier names including Ataraxia, Àbbathör, and Steelers before settling on their current identity.

Aura Scent is a death/thrash metal band with progressive elements hailing from Osório, Rio Grande do Sul, Brazil, formed in 2021. Operating in the extreme underground of southern Brazil, they blend the aggression of death and thrash metal with progressive song structures, a combination relatively rare in their coastal Rio Grande do Sul home city.

Auro Control is a progressive power metal band from Salvador, Bahia, Brazil whose debut album "The Harp" (2024, Rockshots Records) fuses melodic power metal with progressive depth and Bahian percussion. Produced by Thiago Bianchi (Noturnall, ex-Shaman) and featuring guest appearances from Jeff Scott Soto, Aquiles Priester (W.A.S.P., ex-Angra), and Felipe Andreoli (Angra), the record announced the quintet as one of Brazil's most ambitious new acts in the genre.

Aurora Ortus is a black/doom metal duo from São Paulo, Brazil composed of Victor Alves (guitar, drums, bass, vocals) and Dhiego Joly Botogoske (vocals), whose name translates roughly as "dawn's ascension" — a metaphor for hope emerging from depression. Since forming in 2019, they have built a prolific discography including "Drought," "Sunless Life," "Ostara," and "Against Ourselves," exploring themes of depression, mortality, and nature through slow, suffocating riffs and bleak atmospheres.

Austral is a black metal band from Santiago, Chile, formed in 2018, whose lineup features vocalist Matías Briones (aka Zaitham Iscariote), guitarists Blackterium and Maleficarvm, bassist Terrorwielder, and drummer Invokker. The band released their debut full-length, the sprawlingly titled Pestilential Souls Falling into the Endless Vortex of Misery, in 2018, drawing on themes of mysticism and spiritual corruption.

Austral Nox is an independent symphonic black metal band from Santiago, Chile, whose lyrical themes span horror, death, and nature. In 2018 they released the four-track EP The Forsaking of the Sun, featuring songs including "Angelical Mutilated Skies" and the eight-minute title track.