Ill Reasoning is an extreme metal band from Concepción, Chile, formed with the intent to create direct, riff-driven music described by the band as a "sonic apocalypse." They released their self-titled debut EP on January 23, 2022 — four tracks recorded and mixed at Neolitic Studios in Concepción and mastered at 15Hz Studios in Santiago — followed by the single "Immolation" in 2023.

Immemoriam is a melodic doom/death metal band founded in 2017 in Cali, Colombia, by original members of local act Nameless. The lineup was completed in 2018 with Demolt on drums (ex-Misty Fate, ex-Liturgia), Jaime G. on vocals (Dissention), and William T. on keyboards (Alpha Cygni), and the band has released the singles Arrival (2018) and Prey of Oblivion (2019).

Immortuos is a death metal band from Marília, São Paulo, Brazil, formed around 2012 by guitarist and vocalist Jabah Contardi, bassist Rogério Pereira, and drummer João Moreira. The trio released the demo "Infanticídio" in 2012 and followed it with the album "Estágio Terminal" in 2014. The band has been on hold since the mid-2010s, leaving behind a compact but focused body of work rooted in old-school death metal.

Imperial Doom is a death metal band from São José do Rio Preto, São Paulo, Brazil, with roots tracing back to 1994 and a renewed activity in the early 2020s. The band released the demo "MMXXII" and the recording "Forest of Blood" in 2022, followed by "MMXXIV" in 2024, maintaining a prolific output since their return. They play old school death metal rooted in the traditions of the early Brazilian and international extreme metal scene.

Impietus is a thrash/death metal band from Rio de Janeiro, Brazil, formed in 2011. The band released two recordings in 2023 — the full-length Demons and the single Blind Eye — drawing comparisons to acts like Deicide and Cannibal Corpse with a no-frills approach blending death metal with thrash and grindcore elements.

Impulse Noise is a death metal band from São Paulo, Brazil. The duo of Marcelo "Batis" (guitars, bass, and vocals) and Demétrius Locks (drums) released their debut album Aghoris in 2022, a nine-track record on which Batis composed all original material and handled mixing and mastering duties. The album draws on the technical and brutal strains of the São Paulo death metal tradition.

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.

In the Shadows is a doom/death metal band from Anápolis, Goiás, Brazil. The band contributed the track "De Profundis (the Chorus of the Damned)" to the Doomed Serenades Vol. 1 Brazilian doom metal compilation (2012) and later appeared on The Sound of Satanic Hellbangers Vol. III (2023), demonstrating a long-running presence in the Brazilian doom underground. Their music engages with themes of darkness, despair, and death common to the doom/death tradition.

Inanna was a death metal band from Santiago, Chile, formed in 2000 by guitarist Diego Ilabaca and vocalist/bassist Max Neira, drawing on Lovecraftian horror, ancient mythology, and progressive death metal influences in the vein of Morbid Angel and Cynic. Over a 25-year run they released three studio albums — Converging Ages (2008), Transfigured in a Thousand Delusions (2012), and Void of Unending Depths (2022, via Memento Mori Records) — before disbanding in August 2025.