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).

Inner Rage were a Brazilian experimental brutal death metal act who originated in São Paulo before relocating to London, England. The band pursued themes of inner struggle, rage, and politics, and gained visibility through contributions to high-profile UK metal press compilations, including tracks on Terrorizer Magazine's Fear Candy 32 and Fear Candy 49 (2006–2007) and Zero Tolerance Magazine's audio sampler. The project eventually split up, leaving those compilation appearances among their most documented traces.

Inner Rotten was a trio from Temuco, Chile, playing a raw, noisy blend of speed metal and hardcore punk under the pseudonyms Peyo Sinister, Neil Weedminister, and Dirty Rorro. The band released several recordings including the albums Pissed Off Mind and Double Electric Discharge, and the 2012 six-track album Live Incorrectly. Fuck For Fun. Die Laughin', channeling the destructive energy of Black Sabbath and 1980s punk into a scrap-crusher sound.

Inner-I is a sludge and post-metal band from Bauru, São Paulo, Brazil, drawing on the monolithic, atmospheric sound of acts like Cult of Luna and ISIS. The five-piece — featuring Gabriel Franco on vocals, Jean Botari and Danilo Monti on guitars, HB Neto on bass, and Lucas Assis on drums — recorded their debut self-titled EP in April 2021 at Estúdio SomBrio in Bauru, releasing the four-track effort in January 2022. The band subsequently rebranded as INИERI in 2024.

Innerlike Stryd is a symphonic funeral doom and death metal solo project from Rio de Janeiro, Brazil, founded in 2019 by multi-instrumentalist and vocalist Seektor. The project blends crushing, slow-motion doom with ambient and orchestral elements, and released its debut digital EP Frames in 2019. Subsequent material includes the single Caixão Celestial featuring guest vocalist Despair, further developing the project's immersive, sepulchral sound.

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.

Innocence Lost is a progressive and symphonic metal band from Rio de Janeiro, Brazil, founded in 2007 by vocalist Mari Torres and keyboardist Aloysio Ventura, with their debut EP arriving in 2012. After a hiatus following lineup changes in 2017, the band returned to release their debut full-length album Oblivion on March 22, 2024, a record that combines power metal foundations with progressive depth and prominent bass-forward production. The band has shared stages with major acts, including a 2016 Brazilian tour run alongside American power metal outfit Kamelot.

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.

Inquisicion is a heavy metal institution from Santiago, Chile, founded in 1993 by guitarist Manolo Schäfler alongside drummer Carlos Hernández, operating briefly as Santa Inquisición before shortening their name in 1995. Their 1996 debut Steel Vengeance was the first Chilean heavy metal full-length in nearly a decade and earned them the Breakthrough Band of 1996 award; the band has since released six studio albums, including the conceptual Codex Gigas (2014, Australis Records) — nominated for best Chilean metal album at the 2015 Pulsar SCD awards — and Preacher and Lust (2016), with the lineup having shared stages with Mercyful Fate, Judas Priest, and Blind Guardian over their three-decade career.