Inferi is a black metal band founded in Buenos Aires, Argentina by drummer Inferi Black (Sebastián Rodríguez), who released the debut album "The Call of the Dark Side" in 2000 and went on to record "The End of a Weak Nature" (2009) before relocating to Austria in 2013. After a hiatus, the band reformed in 2018 with a new lineup and released the fourth full-length "Fourth Portal" in April 2020.

Inferis is a death metal band from Santiago, Chile, formed in 1998 around guitarist Gonzalo Riveros and a rotating lineup that has included members such as vocalist Rodrigo Manzor and drummer Mauricio Castillo. The band released their debut album In the Path of Malignant Spirits in 2007 through Polish label Old Temple, followed by Obscure Rituals of Death and Destruction in 2013, building a catalog of satanic, blasphemous death metal over their two-decade career.

Infernal Atröz is a black/thrash metal band from Blumenau, Santa Catarina, Brazil, formed in 2022 and rooted in Satanic themes. The band released a debut single-demo in January 2023, followed by the track "A Noite da Caçada" and a full demo in 2024. They operate as an unsigned independent act within southern Brazil's underground extreme metal scene.

Infernal Attack was a black/thrash/speed metal band from Itabaiana, Brazil, featuring guitarist and vocalist Jhonata Hellfire and drummer Julio Hellbutcher. The band released the EP Eternal Desire in 2020 through Sacrifice Records of Portugal as a hand-numbered limited cassette edition of 70 copies. The release was described as "unholy black/thrash from Brazil" and represents the band's key recorded output before their split.

Infernal Cemetery is a blasphemous black/death metal band from Coronel Marcelino Mariduena in Ecuador's Guayas province, formed in 2024. Their debut release "Necrosemen of Impurity Genocide" delivers fast riffing over blasting double bass drums with lyrics centered on occultism, Satanism, and anti-Christianity, positioning the band as part of the rotten extreme metal underground of South America.

Infernal Hate is a thrash metal band from Ijuí, Rio Grande do Sul, Brazil with a long-running presence in the country's underground metal scene. The band's discography includes the full-length Upset (2008) and the demo ...See Me Come (2022), both catalogued in the Encyclopaedia Metallum. They remain active as an independent act within Brazil's southern thrash metal underground.

Infernizer is a thrash/death metal project from Caruaru, Pernambuco, Brazil, conceived during the pandemic by Alex Morais, also known from the band Storms. The project released its debut EP Pandementia in 2022, featuring four tracks that draw on thrash, death, black metal, and hardcore influences, with themes addressing pandemic chaos, denialism, and social decay. A second EP, Odiocracia, followed in 2025 with five tracks recorded with producer Daniel Farias.

Inferno Nuclear is an old-school thrash metal band from Belém, Pará, Brazil, formed in 2007 under the name Old School Attack before adopting their current name. Drawing heavily from the Bay Area and German thrash traditions — citing Exodus, Testament, Kreator, and Sodom as key influences — the band features vocalist Wellington Freitas alongside rotating members including guitarist Alexandre Durães. Their 2021 album Diante de um Holocausto was recorded at Chaar Estúdio in Belém and stands as one of their most fully produced releases.

Infernus is a black metal band from Rosario, Santa Fe, Argentina, whose lyrical themes center on Satan, wolves, and war. The band released the album "Xul Eterna" in 2012, a work documented on Metal Archives and reviewed in the Argentine underground metal press. They remain an independent, unsigned act within the Rosario extreme metal scene.