Abominor was a black metal band from Barra Mansa, Rio de Janeiro, active from 2015 until their split-up. The band played dissonant, uncompromising black metal and released recordings including Oration MMXVI and Source of Chaos during their run in the Brazilian underground.

Aborior was a black metal band from Brasília, active during the mid-2000s to around 2010. The band played raw black metal with anti-Christian lyrical themes, part of a wave of underground extreme metal acts that emerged from Brazil's federal capital in the 2000s decade.

Aborticide was a brutal death metal band from Sete Lagoas, Minas Gerais, formed in 2009. The band played in the tradition of Brazilian brutal death metal with themes of demonology and darkness, and contributed to the compilation Warriors of Morbid Moon Vol. 2 before disbanding.

Abortismo is a crossover thrash/punk band from Glew, Buenos Aires Province, featuring vocalist Lazaro Infante, guitarist Ariel Zurita, and the Marmet brothers on bass and drums. The band released their self-titled EP in February 2019, recorded and produced by Damian Nayar at Neurótico Records in Buenos Aires.

A death metal and grindcore band from Brasília formed in 2017, operating in the tradition of Brazilian extreme metal with the short, brutal blasts characteristic of the grind style. Working out of the country's capital — less historically prominent in extreme metal than São Paulo or Belo Horizonte — the band contributes to a growing underground scene in the city.

A melodic heavy metal and hard rock band from São Paulo, active since 2020 and distinct from the older São Paulo band of the same name. Drawing from the melodic heavy metal tradition with an emphasis on hooky riffing and hard rock energy, the band operates in the city's long-established metal underground.

A Rio de Janeiro outfit formed in 2022 that blends crushing doom and sludge metal with atmospheric black metal textures, releasing material including the demo "Oblivion" and the album "Luz No Fim Do Túnel." The band takes its name from the video game Outer Wilds, reflecting an exploratory aesthetic built on slow, heavy riffs and bleak atmosphere.

A death metal band from Barão Geraldo — a district of Campinas, São Paulo state — formed in 1994 by brothers Glauco Silva and Caio Cezar. They released the demo "Pestilent Emanation" in 1994 and appeared on the compilation "Death Or Glory Vol. 1" in 1995 before eventually splitting up.

A short-lived death metal band from Carapicuíba, a municipality in Greater São Paulo, formed and dissolved around 2020. With minimal recorded output and little web presence, the band was part of the dense underground death metal activity in the São Paulo metropolitan area before going inactive.