Buena Muerte is a death metal band from Florencio Varela in the Buenos Aires metropolitan area of Argentina, featuring guitarist and vocalist Favio Leguizamon alongside bassist Jose Manuel Araujo and drummer Hector Benito Paz. The band released the Dios Es Sádico EP in 2018 and the full-length album Catalepsia in 2024, building a steady presence in Argentina's underground death metal scene over two decades.

Buffalo is a stoner metal band from Buenos Aires, Argentina, formed around 2002 by guitarist and vocalist Claudio Filadoro following his tenure as bassist in legendary Argentine desert rockers Los Natas. The band has released six studio albums including their debut Temporada de Huracanes (2002), Karma (2005), and Parálisis (2018), blending heavy stoner riffs with 1970s hard rock influences across a catalog spanning nearly two decades.

Bullet Course is a doom and post-metal band from Curitiba, Paraná, Brazil, formed in 2011. The band blends dissonant guitar work with themes of existential emptiness, drawing on blackgaze and experimental rock influences alongside their doom and post-metal core. They have released three albums — "Without Memories," "Into the Solitude," and "She's Looking for Flowers Under City Light" — and performed at the Eclipse Doom Festival in São Paulo.

Bulletback is a heavy metal band from São Paulo, Brazil, active in the Brazilian underground metal scene. The band has contributed to notable Brazilian tribute compilations, performing "Where Eagles Dare" on the 2020 double album "Somewhere in Brazil – The Brazilian Tribute to Iron Maiden" and "World Painted Blood" on the 2021 "Brazil Painted Blood – The Brazilian Tribute to Slayer."

Burial Temple is a death metal band from Brasília, Brazil, whose music is centered on themes of necrolatry, funeral rites, and death worship. The band released their debut demo "Mortal Scum" in 2019, recorded live at Texas Studio in Brasília, and the recording was released in 2020 through underground label Cianeto Discos. They describe their sound as "an agonizing threnody of misery; a passionate ode to Death and its infinite ways."

Buried in Corpvs is a metalcore band from Santiago, Chile, formed in 2015. The band released the EP "Catharsis" as their debut, a six-track effort that established their presence in Santiago's heavy underground scene.

Burn the Mankind is a technical death metal and grindcore band from Porto Alegre, Rio Grande do Sul, Brazil, founded by guitarist Marcos Moura, a former member of Brazilian death metal act Nephasth. The band released their debut album "To Beyond" in 2015 and followed it with the conceptual EP "Chaos Matter" in 2020 via Cianeto Discos, the latter built around the four phases of human alchemy. Their current lineup includes members with ties to several prominent Brazilian extreme metal bands.

Burning Dusk is a melodic death metal band from Valparaíso, Chile, originally founded in 1999 and later reconstituted around 2014. The band released the four-track EP "Shameful Angel" in May 2014 and followed it with the full-length "Scavenger of Light" in 2015, drawing on Scandinavian-influenced melodic death metal while maintaining an independent status.

Burning Tears was a gothic metal band from Santiago, Chile, whose sound drew from doom, black metal, and classical influences with flute as a featured instrument. The band released the album "Tales from a Disturbed Soul" in 2009, recorded and mixed by Franco Maestri at FM Estudio in Santiago, with tracks like "Snow Tears" and "Bride of Death" generating attention in the Chilean gothic metal scene.