Aggressors are a death/thrash metal band from Botucatu, São Paulo state, formed in 2014 around members who previously played together in a different project. Their debut EP The First Evil, released through Odioground Records in September 2016, delivers four tracks of grinding riff-driven thrash with death metal brutality and lyrical themes focused on war, religion, and political critique.

Agnata Fides are an atmospheric black metal and dark ambient band from Patos de Minas, Minas Gerais, formed in April 2014 by a four-piece lineup including NaWotam on bass and vocals and DDøS on guitars and keyboards. Their self-titled debut album, released in November 2014 on Depressive Illusions Records and recorded at Aethyr Home Studio in Patos de Minas, blends raw black metal aggression with keyboard-driven ambience around themes of Luciferianism and Hyperborean mysticism.

Agnideva are a black metal band from Campina Grande, Paraíba, formed in 2009 and operating independently in Brazil's northeastern underground scene. Their lyrical focus is rooted in Vedic paganism and anti-Christian occultism, making them a rare voice in Brazilian black metal drawing on Hindu spiritual imagery rather than the genre's more typical Satanic or Norse frameworks.

Agnozia are a death metal power trio from Belo Horizonte, Minas Gerais, assembled during the pandemic and dedicated to old-school death metal in the tradition of the early 1990s. Their debut album Ultra-Violence, released in May 2023 on Black Hearts Records, delivers eight tracks of churning riffs and brutal drumming with song titles like Innate Antropophagy and Moritvri Mortvis signaling an unapologetically visceral approach.

Agnus were a raw black metal band from Teófilo Otoni, Minas Gerais, active only briefly in 2024 before splitting up. A short-lived project in the Brazilian underground, they operated in the lo-fi, stripped-back tradition of raw black metal with no production sheen and minimal structure.

Agnus Die are a thrash metal band from Vinhedo, São Paulo state, formed in 2015 and active in the Brazilian underground thrash circuit. Based in the interior of São Paulo state, they play traditional thrash metal and remain an independent, grassroots act with limited wider documentation outside the Metal Archives registry.

Agonic Autumn is a solo black metal project by the musician known as Black Tormentor, based in Linares, Maule, Chile, founded in 2020. The project has released two albums: "Agonic Reflections" in December 2020 and "The Last Flame of Life" in December 2023, with all instruments recorded by Black Tormentor at Arkaiko Studio in Constitución.

Agoniza are a thrash/death metal band from São Paulo formed in 2020 and self-releasing their material independently. Emerging from the city's long-running extreme metal underground, they combine the direct aggression of thrash with death metal heaviness in the tradition of São Paulo's prolific extreme metal scene.

A death metal band from Governador Valadares, Minas Gerais, formed in 2017 and active only briefly before splitting up. They played in the straightforward Brazilian death metal tradition, drawing on the aggressive, guitar-driven sound typical of the country's underground scene.