Bad Taste is a death/thrash metal band from Porto Alegre, Rio Grande do Sul, Brazil, formed in 2017. They operate out of the South Brazilian underground, a region with a strong tradition of extreme metal, playing aggressive thrash rooted in the death metal aesthetic. The band remains active as an independent act.

Badhead is a thrash/crossover hardcore band from Brasília, Brazil, formed in 2015. Blending the pit-ready aggression of hardcore punk with the riff-driven attack of thrash metal, they contribute to the capital's vibrant underground crossover scene. The band remains active as an independent act.

Badtrip Surfdeath is an instrumental power trio from São Paulo, Brazil, active since 2008 and coined the term 'surfdeath' to describe their collision of hardcore, grind blasts, black metal riffs, and psychedelic textures. The trio of Rodrigo Chã (guitar), Manéu Junqueira (bass), and Marcus Dentão (drums) released their self-titled debut in 2011 followed by Badtrip Surfdeath II in 2013, both recorded in São Paulo. Their entirely wordless approach lets the genre-blurring density of the music speak for itself.

Bael was a black metal band from Santo André, São Paulo, Brazil, formed in 2024 and short-lived. Emerging from the Greater São Paulo underground, the band pursued the raw and nihilistic black metal aesthetic before splitting up the same year they were founded. Their brief existence places them within the dense web of São Paulo-area black metal acts working in the underground tradition.

Bagronk is a death/black metal band from the southern suburbs of Greater Buenos Aires, Argentina, with roots going back to an early 2000s formation. The band recorded the demo "Death and Blood Valley" and has built a persistent presence in the Argentine underground extreme metal scene across multiple active periods.

Bagual is a stoner metal and heavy psych band from Santiago, Chile, comprising Francisco "Greengo" Yañez (guitars and vocals), Felipe Machuca (guitars), Julián "Lobo" Inostroza (bass), and Alejandro Clavijo (drums). The band debuted with I: Viento Sur (2014) and followed with II: Viento Norte (2015), both recorded independently in Chile, and have continued releasing music through Nulla (2017) and Inhvmar (2024).

Bagual is a stoner metal and heavy psych band from Santiago, Chile, comprising Francisco "Greengo" Yañez (guitars and vocals), Felipe Machuca (guitars), Julián "Lobo" Inostroza (bass), and Alejandro Clavijo (drums). The band debuted with I: Viento Sur (2014) and followed with II: Viento Norte (2015), both recorded independently in Chile, and have continued releasing music through Nulla (2017) and Inhvmar (2024).

Baixo Calão is a grindcore band from Belém, Pará, operating out of the Amazon region and representing one of the more distinctive voices in Brazil's northern underground extreme metal scene. Their sound is rooted in old-school grindcore — relentless blasts, caustic riffs — with lyrical themes targeting anti-religion, social decay, and political corruption. The band gained notable exposure through the European underground circuit, including a performance at the Obscene Extreme Festival in the Czech Republic.

Bajo el Exilio is a five-piece metalcore and hardcore band from Santiago, Chile, who have been active since around 2009–2010 and built a catalog spanning heavy studio albums and live recordings. Their releases include the EP Tras las Cadenas (2010), the full-length Nuestros Verdugos (2013), Resistance (2016), and Contraluz (2023), with the sprawling live-and-studio hybrid Entre Sombras y Ruido following in 2025. All production on Contraluz was handled in-house by guitarist Darío Llancamán, reflecting the band's self-sufficient approach to their craft.