Bestial Atrocity is a satanic black metal band from Piracicaba, São Paulo, Brazil, playing a style that incorporates death metal and grindcore elements. Their 2007 demo "Odes To Satan" and the live recording "B.A.C.K. (Bestial Atrocity Creating Kaos)" document their activity during a reformed period before the band ultimately split up.

Bestial Curse is a black/thrash metal band from Niterói, Rio de Janeiro, Brazil, drawing influence from Hellhammer, Venom, and Bathory. The band features members with ties to Brazilian acts Apokalyptic Raids and Flagelador, and released the album "Masters of Mayhem," recorded at Eclypse Studio in Niterói, on Dark Sun Records.

Bestial Nuclear Atrocity is a Brazilian black/death metal band formed in 2022. They released "Holocausto Podre e Profano da Desolação" in September 2022, a recording mastered by Filipe Silva that places the band within Brazil's underground bestial black/death metal tradition.

Bestial Perception is a brutal and technical death metal band from La Plata, Argentina, featuring vocalist Necroseba and guitarist Martin Furkaz. The band released their debut album Pareidolik in December 2023 through Artes Negras Productions, with the album's title drawn from the psychological concept of pareidolia — the tendency to perceive meaningful shapes in random surfaces. Their sound centers on themes of catastrophe, sickness, and destruction.

Bestial Profanation is an old school death metal band from San Antonio Oeste, Río Negro, Argentina, formed in 2021 by guitarist and vocalist Matias Carrasco alongside bassist Cristian Sarmiento, drummer Alexis Basanta, and rhythm guitarist Alexander Alonso. The band released the three-track EP Legion of the Undead in 2021, followed by their debut full-length Sanctuary of the Living Dead in January 2022 through Argentine label Putrid Records. Their sound draws on the rawness of Autopsy alongside Swedish and Floridian death metal influences.

Bestialgoat is a two-piece war metal act from São Cristóvão/Aracaju, Sergipe, Brazil, formed in 2020 by I. Lead Injektor (guitars/bass) and A. Mutilator (vocals/drums). The duo has been noted as a standout in the new wave of Brazilian bestial black metal, releasing the full-length "Infernal Goat Extermination" in 2024.

Bestialthrone was a black metal band from Caxias do Sul, Rio Grande do Sul, Brazil, formed and split up in 2024. The band pursued lyrical themes of occultism, satanism, vampirism, and death, and was released through the Dirae Tenebrae label during its brief existence.

Bestiario is a black metal band from La Rioja in the Argentine northwest, self-described as "Black Metal From the Argentinian Northwest" and centered on themes of darkness, occultism, and eternal recurrence. The band released a demo in 2019, followed by the album En los Albores del Nuevo Oscurantismo in May 2022 and the album Saturnalia. They remain active and independent.

Bestiarum is a melodic death metal band formed in 2018 in La Plata, Argentina, drawing on the Gothenburg sound of bands like At the Gates, In Flames, and Soilwork. Their 2020 debut album Entropy was recorded and mixed at Octavarium Studios in La Plata and includes a music video for the title track featuring guest vocalist Björn Strid of Soilwork. The band has remained active since their formation.