Astaria is a traditional heavy metal band from the greater Porto Alegre area of Rio Grande do Sul, formed in 2019 across the neighboring cities of Cachoeirinha and Porto Alegre. The band draws from the classic heavy metal canon in the vein of bands that shaped the strong gaúcho metal scene, with clean vocals and melody at the forefront of their approach.

Not to be confused with the legendary 1980s Porto Alegre act of the same name, this Astaroth was a short-lived traditional heavy metal band from Porto Alegre, Rio Grande do Sul, active briefly around 2020 before splitting up. The city has a storied heavy metal heritage — the original Astaroth released the first heavy metal LP from Rio Grande do Sul in 1986 — and this later outfit carried that name into the modern underground scene.

A Brazilian thrash and heavy metal band formed in 2012, with limited documentation outside of the Metal Archives listing. Their sound sits within the tradition of direct, riff-driven Brazilian heavy and thrash metal, carrying on the style that defined the country's underground metal circuit through the 1980s and 1990s.

Athos is a heavy metal band from Fortaleza, Ceará, formed in 2022 and currently active. Part of a thriving underground metal scene in Brazil's northeast, the band plays traditional heavy metal rooted in the classic sounds of the genre.

Atila is a heavy metal band from Posadas, Misiones, Argentina, considered one of the pioneering metal acts of the province. The band — built around vocalist Sergio Toledo, guitarist Javier Duarte, and bassist Cristian Guaglianone — released their debut album Azote de Dios in 2017, followed by a second record, Mal Negocio, blending classic heavy metal with updated material spanning two decades of the band's history.

Atlantis is a traditional heavy metal band from Jaraguá do Sul, Santa Catarina, Brazil, formed in 2007 and signed to Classic Metal Records. Drawing on New Wave of Old Heavy Metal influences, the trio — Tino Barth, Bruno Eggert, and Fellipe França — explore occult and mythological themes across albums including their self-titled 2020 record, "Power in Our Hands" (2023), and "Volume II" (2025).

Avenger is a traditional heavy metal band from São Paulo, Brazil, active since 1998. Rooted in the classic British and American heavy metal tradition — with clear debts to Judas Priest, Black Sabbath, and Motörhead — the band plays no-frills steel with a São Paulo underground sensibility, maintaining an active presence in the Brazilian metal circuit across multiple decades.

Axia was a heavy metal band from Campinas, São Paulo, Brazil, formed in 2018 and active until their split. Playing straightforward traditional heavy metal in the Brazilian underground mold, the band recorded and released material before disbanding.

Azor is a heavy metal band from Ameghino, Buenos Aires Province, Argentina, formed in 2015. The band has contributed to regional metal compilations including "Awqatinku - Volumen 3", a collection documenting underground metal acts from across Argentina.