Infinity Horror was a death metal band from Assis, São Paulo, Brazil, formed in 2014 and later disbanded. Their debut recording, the demo Celestial Profanation, was released on February 17, 2014, and recorded at Estudio Improviso. The band operated within Brazil's underground old-school death metal circuit during their brief active period.

Infræterium is a death metal band from Bogotá, Colombia, active since 2016, previously operating as Dwellers of the Shadows. The band released a series of demos and singles throughout 2016 and 2017, including Sentinels, Portraits, and Veneno y Dolor, establishing themselves in the Colombian underground death metal scene.

Inheritours is a death metal band from Caxias do Sul, Rio Grande do Sul, Brazil, formed in 2014. The band is noted for their drummer Mateus Michelon, who became recognized beyond the local scene and went on to join the band Losna.

Inhuman Penitence is a death metal band from São Paulo, Brazil, formed in 2018, featuring vocalist Gabi Crust Force, guitarists Diego Noise and Renato Gimenez, bassist Nilson Slaughter, and drummer Daniel Vecchi. The band has released tracks including "Cave of Forgotten Dreams" and "Lessons of Darkness", establishing a five-piece lineup rooted in the São Paulo extreme metal scene.

Initiate Decay is a death metal band from Esteio, Rio Grande do Sul, Brazil, active since 2018 and rooted in the brutal and technical ends of the genre. Their debut release, Awaken the Extinction (2018), established the project's dense, aggressive sound, with the band describing their approach as combining brutality with technical complexity. The lineup has included Aires Trajano and Alexandre Graessler among its members.

Inner Branch is the solo death metal project of musician and composer Mario Bello Araneda from Carahue, Chile, in the Araucanía region. The project released the album Espejo de confusión, recorded at Mario Bello's home studio and mixed and mastered at Neurotic Records in Temuco.

Inner Demons Rise is a death metal band from Recife, Pernambuco, Brazil, with a history stretching back to their original formation in 2008 and a renewed active phase from 2016 onward. Their lineup features vocalist Alcides Burn, guitarists Paulo André and Maguel Dantione, bassist Magno Lima, and drummer Osvaldo Magno. The band released the full-length In the Name of the Father, and of the Son and Violence in 2016 and previously contributed to the tribute compilation Born to Punish the Skies... Tribute to Headhunter D.C. Volume 1 (Mutilation Productions, 2014).

Innerte is a groove/death metal trio from Belén de Escobar, Buenos Aires, formed by vocalist and bassist Martin Teixeira, guitarist Cristian Lopez, and drummer Fernando Zamora. The band released their debut album "El nervio muerto de la libertad" in 2016 and followed it with "La aurora de lxs rotxs" in 2018, both recorded and engineered by Andrés Urbano at DBU studio. Their lyrics directly address themes of social inequality, patriarchy, and political resistance, written from an openly anarchist standpoint.

Inoculation is a death metal band from Salvador, Bahia, Brazil, formed in 1992 and reactivated in 1999 after a brief hiatus. The band built their reputation through a series of demo and promo tapes in the early 2000s, and their catalogue was later collected on the compilation Hidden Paths of Death, released in 2018 via Dark Recollections Productions. A live recording from a 2001 performance in Salvador, titled To Die Just to Be Live (Desecrating Your Soul with Fire), documents the band's intense early-era show.