Beyond the Grave is a thrash metal band from Itaquaquecetuba, São Paulo, Brazil, with lyrical themes centered on war, death, and religion. The band released the full-length album "Predictions of Disgrace" in 2016 through Kill Again Records, their second studio effort, recorded at No Limits Estúdio in Arujá. They have maintained an active presence in the Brazilian underground thrash scene with additional demo and compilation appearances.

Big Bastards are a Santiago groove and D-beat metal band who released their self-titled five-track debut in September 2021. The record is a raw and direct statement of political and social rebellion, with tracks like "Hijos del fuego" and "Muere por tu lider" driving home its confrontational edge.

Billy Grind e os Podres is a one-man noisecore and raw black metal project from Catanduva, São Paulo, Brazil, started by musician Billy Grind in 2020. The project is rooted in the Brazilian underground noise and grindcore circuit, self-described as delivering "the worst noise of your life," and has been prolific since its inception with releases including "Demo 1" (2020) and the compilation "A Fistful of Noise" (2021). The project later expanded into raw black metal territory while maintaining its lo-fi, abrasive aesthetic.

Bio Terror are a black/thrash metal band from Chillán, Chile, operating in the tradition of South American necro metal with themes of anti-Christianity, destruction, and war. Their 2023 compilation "Blasfemia, Sodomia y Muerte," released on limited cassette through Spain's Profaner Records, gathered material from across the band's entire history alongside live recordings from a 2021 show in Talca.

Biomenace was a thrash/death metal band from Belo Horizonte, Minas Gerais, Brazil, formed in 2010 and later split up. The band operated within Belo Horizonte's historically rich extreme metal underground and released at least one demo, "Eternal Suffering," which is catalogued on Encyclopaedia Metallum.

Biomorf is a science fiction-themed death metal band from Maringá, Paraná, Brazil, formed in 2018 and currently active. The band's lyrics explore technology, space travel, cosmology, and science fiction, setting them apart within the Brazilian death metal underground. They released the EP "Dark Matter Disintegration" in 2018 and have continued releasing material through their Bandcamp page.

Bipolar Noise is an extreme metal band from Jacareí, São Paulo, Brazil, formed in 2021. The trio blends grindcore, death metal, and hardcore with psychedelic lyrical themes and shifting tempos, releasing the EP "Necrocão" on Bandcamp.

Birror is a crossover thrash band from Buenos Aires whose debut album Birr 'em All, released in December 2014, packed 17 tracks of punishing riff work into a single record. The band has roots in Argentina's underground crossover and hardcore scene and counts songs like "Rey de Maltas" and "Birrorman" among their early staples.

Bisonte is a stoner/doom/sludge metal band from Tuxtla Gutiérrez, Chiapas, formed in 2019 by Paulina and Mario as a vehicle for heavy, spiritually charged music. The band released their debut EP, The Beholder, in 2021, and followed it with their first full-length, Mother Tempest, in February 2025, which includes a cover of The Melvins' With Teeth. Their music draws on the slow, crushing traditions of doom and sludge metal with an introspective lyrical focus.