Amud is a Christian black metal (unblack metal) band from Belo Horizonte, Minas Gerais, Brazil, formed around 2019 and still active. With members Anderson Nogueira Shu, Samuca Nogue, and Rafinha Nogue, the band wields black metal aggression in service of explicitly Christian themes, countering Satanism with their lyrics — a tradition in Brazilian unblack metal. Their discography includes multiple demos such as "Deuses de Pedra Não Salvam!" (2012), "Fogo no Cão" (2014), and "Perdeu Capeta" (2017).

Amurians is an all-female heavy metal band from São Paulo, Brazil, formed in 2018. Their name and identity are rooted in the legend of the Icamiabas — an indigenous matriarchal warrior tribe of the Amazon region — and two of the members carry indigenous ancestry through their maternal grandmothers; the band channels this heritage into forceful, traditional heavy metal with a message of female empowerment in the Brazilian underground.

Amuro was a black metal band from Florianópolis, Santa Catarina, Brazil, active from 2013 until their split-up. The band explored symphonic black metal textures and performed live in the Santa Catarina underground circuit, sharing members with the local heavy metal act No One Spoke; their setlists included originals such as "Will To Death" and "Misanthropy" alongside covers of Norwegian black metal classics.

Anal Carnage is a death/grind band from Victoria, Chile, whose origins trace back to a grindcore project called Necrosis before the band adopted their current name. They released a self-titled demo in 2007 and followed it with the six-track record "Uncontainable Temptation to Kill" in 2009, establishing a brutal sonic identity rooted in the Chilean underground extreme metal scene.

Anama is a progressive and symphonic metal band from São Bernardo do Campo, in the greater São Paulo metropolitan area of Brazil, formed in 2023. Part of the broader AnamA project that blends symphonic prog metal with ethnic and orchestral influences, the band features Babi Bueno on vocals and keys alongside Caio Garibaldi on guitar, crafting layered cinematic metal with roots in the ABC Paulista underground scene.

Anarca was a heavy metal band from São Paulo, Brazil, formed and disbanded in 2024. Despite their brief existence, they emerged from São Paulo's prolific and competitive heavy metal underground before splitting up in the same year they were founded.

Anarchus is a death/thrash metal band from Belo Horizonte, Minas Gerais, Brazil, active since the late 1980s in the city's vibrant extreme metal underground. The band recorded demos including "Total Hate" (1988) and "Melody's of Destruction" (1989), and released the compilation "Increasing the Hate" in 1997 marking a decade of activity. Their raw, aggressive style reflects the first wave of Brazilian extreme metal emanating from Minas Gerais.

Anarkhon is a death metal band from Guarulhos, São Paulo, founded in 1999, who survived the tragic loss of original vocalist Péricles Hooper to a hit-and-run accident and continued with guitarist Aron Romero — also of black/thrash act Power From Hell — taking over vocal duties. Their early work, including albums "Obesidade Mórbida" (2007) and "Welcome to the Gore Show" (2013), delivered brutal, gore-drenched death metal, before the band evolved toward a more atmospheric and cerebral sound on "Phantasmagorical Personification of the Death Temple" (2020, Debemur Morti Productions), blending cavernous death metal with black metal textures and H.P. Lovecraft-inspired cosmic horror themes.

Anartria was a death metal and grindcore band from Palhoça, Santa Catarina, Brazil, part of the underground extreme metal scene of the state's southern coast. The band blended the punishing brevity of grindcore with death metal heaviness, operating as an independent act before splitting up.