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.

Insânia is a thrash and groove metal band from Recife, Pernambuco, Brazil, whose blunt, Portuguese-language lyrics engage directly with Brazilian society and politics. The band released a self-titled debut in 2019 to regional acclaim and followed it with the full-length Histeria in March 2021, delivering a tighter and more aggressive sound. They subsequently released the single "Dry," their first English-language track, exclusively through Chaoszine, with the lineup featuring Diogo Felipe on vocals, Raffa Farias on guitar, André Cabral on bass, and Vitor Lima on drums.

Insônia sem Fim (Portuguese for "endless insomnia") is a Brazilian depressive black metal project formed in 2024, the work of Invitus Mortuus (Lucas Damaso) and Clenched Fist (Guilherme Costa). The project released the demo-album "Sanatorium of Solitude" in late 2024, followed by "Lone Warrior on the Brink of Death" in 2025, establishing the duo as a prolific presence in the underground DSBM scene.

Intense Desire to Kill is a death metal band from Santa Luzia, Minas Gerais, Brazil, formed in 2015. The band's lineup includes Wesley Adrian on drums, Roger Lúcio on guitars, Warley Alves on bass, and André Luiz on vocals; they released the seven-track demo-EP "Next Victim... Just a Matter of Minutes..." on September 11, 2015.

Interceptor is a traditional heavy metal band from Buenos Aires, Argentina, who recorded their self-titled debut album at La Nave de Oseberg Studios between February and October 2014, releasing it in 2015 on Pacheco Records. The band contributed the track "La piel fría" to the Icarus Music compilation "Heavy metal: Código de honor" in 2016, and later appeared on the cassette and CD-R compilation "Nueva ola del heavy metal Argentino" in 2021. Their sound draws from classic speed and heavy metal in the style of the New Wave of Argentine Heavy Metal scene.

Interceptor is a traditional heavy metal band from Buenos Aires, Argentina, who recorded their self-titled debut album at La Nave de Oseberg Studios between February and October 2014, releasing it in 2015 on Pacheco Records. The band contributed the track "La piel fría" to the Icarus Music compilation "Heavy metal: Código de honor" in 2016, and later appeared on the cassette and CD-R compilation "Nueva ola del heavy metal Argentino" in 2021. Their sound draws from classic speed and heavy metal in the style of the New Wave of Argentine Heavy Metal scene.

Interitvm was a black metal project from Viña del Mar, Chile, operating as a personal venture of Omega, lead guitarist of Chilean black metal band Indoctrinate. The band released the Extermination promo in 2014, followed by the self-released EP Reign of Nuclear Apocalypse in 2017 — a seven-track assault of war-themed black metal that was later reissued on CD in 2023 with bonus tracks through Seven Headed Beast and Deathcamp Records.

Interium is a death/groove metal band from Rio de Janeiro, Brazil, formed in 2002. The band released their debut album "Igreja do Diabo" in October 2002, followed by "Quando a Morte Chama" in September 2004, with a lineup featuring Leandro Thompson on vocals, Bruno Mainardi on guitars, and Lino on bass. They remain active as an independent act rooted in the Rio de Janeiro underground metal scene.

Internal Decay was a thrash/death metal band from Maringá, Paraná, Brazil, formed in 1994 and now split-up. The band released a four-track demo in 1996, representing the band's sole known recorded output from their active years in the mid-1990s Brazilian underground metal scene.