Homicidio is a death/black/doom metal band from Goiânia, Goiás, Brazil, active since the mid-1990s. The band has built a long-running underground catalog, including the album Impuros (2009), Angustia Infinita (2013), and The Pact of Fire (2020), all self-released and available on Bandcamp.

Horda Profana is a bestial black/death metal band from Munro, Buenos Aires, formed in late 2013 by Necromansy (vocals), Lord Nebiros (guitar), Hassthar (bass), and Funeris (drums). They released the full-length Fornicators of Jesus Christ in 2016 and Beyond the Boundaries of Death in 2019 through Sons of Hell Productions, drawing comparisons to Archgoat and Beherit.

Imminent Doom is a black/thrash metal band from Rio de Janeiro, Brazil, formed in 2016. The band released their debut EP "Guerra Iminente" in October 2016, followed by the album "Ataque!" in December 2020. Their sound draws on the aggressive traditions of Brazilian black and thrash metal, delivered with raw, independent production.

Impure Sacrament was a black/death metal trio from General Roca, Río Negro, Argentina, active from 2014 to 2016 under the pseudonyms D.D Profanator (vocals), Blasphemicommand (guitar and bass), and Impuregoat (drums). Their only full-length, "Cursed on the Grave", was released in October 2015 and distributed through Execración Distro.

Incognitum is a black/death metal band from Porto Alegre, Brazil, formed in 2014. The band built a prolific early catalogue with four releases in quick succession: the debut album Odissey (2014), followed by Disastrum (2016), Discolor (2017), and In Through the Gates of Hell (2017).

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.

Insultor was a black/death metal band from General Roca, Río Negro, Argentina, active from 2008 until their split-up. They released the "Demonic Session" live session demo in November 2014 on cassette through Nebulous Black Tyrant in a run of 66 copies, followed by their full-length album "Demonic Curses" in March 2019 via Blackwinds Productions. Their thematic material centred on blasphemy, war, and satanic imagery in the South American underground tradition.