Indiscipline is an all-female heavy metal power trio from Rio de Janeiro, formed in 2014. The band released their debut EP "In My Guts" in 2014, followed by the full-length "Sanguinea" through Shinigami Records in April 2017, and the three-song digital EP "Psalms of Darkness" in 2019. Their lineup features Alice D'Moura on vocals and bass and Maria Fernanda Cals on guitar.

Indisposed was an all-female thrash metal quartet from La Plata, Argentina, formed in 2013, with members Pely Macchi on vocals, Anahí Fernandez on guitar, Salo Astudillo on bass, and Laura on drums. The band released two EPs, "Hangover" (2015) and the self-titled "Indisposed" (2017), both rooted in classic 1980s thrash with high-energy tempos and sharp twin guitars.

Indoraza is a heavy/folk metal band from Huancayo, Peru, formed in 1998 with a mission of celebrating Andean culture and indigenous heritage through their music. Their name fuses the words for "indigenous" and "race," reflecting their commitment to honoring the pre-Columbian worldview of their ancestors. Their catalog spans multiple EPs and culminates in the 2025 full-length "Ayahuasca."

Industrial Noise is a grindcore and death metal act from Presidente Prudente, São Paulo, Brazil, with roots going back to 1994 and activity continuing through several periods into the present era. The band appeared on the No Fashion HC Records compilation "O Progresso da Regressão" (2000) with the track "Padrões de Cultura," and has released material through Cianeto Discos.

Infamous Glory is a death metal band from São Paulo, Brazil, with roots tracing back to 1999 and a discography spanning three demos, three EPs, two splits, and the full-lengths "Deathstrike Revenge" (2010), "Bloodfeast" (2013), "An Ancient Sect of Darkness" (2019), and "Algor Mortis" (2024). The band draws influence from old-school and Scandinavian death metal, and has shared stages with notable acts including Dismember, Krisiun, and Voivod.

Infectai is a speed/thrash metal and crust band from Florianópolis, Santa Catarina, Brazil, formed in 2012 by André (vocals), Murilo (drums), Aranha (guitar), and Sapo (bass). Drawing on the raw energy of 1980s punk and metal, the band writes music with explicitly critical content targeting contemporary economic and social systems. Their self-titled EP, released in October 2012, contains four tracks including "Frutos de Um Problema Social" and "Escravo do Inferno."

Infected Cells is a death/thrash metal band from Simões Filho, Bahia, Brazil. The band released their debut EP "Voices from the Hell" in 2018, recorded between 2015 and 2017 at WR Bahia Studios in Salvador, Bahia; the seven-track EP was later released on cassette in 2022. They followed it with the EP "This Is the End" (2020) and a live album documenting their appearance at Dopesmoke Festival in 2021.

Infected Morchirium is a black metal band from Maringá, Paraná, Brazil, formed in 2023, featuring Ghvme on vocals, Chicxvlvb on guitar, and Danilo Campaner on drums. The band released their debut album "Luciferum" on December 1, 2023, a nine-track record produced and mixed by Danilo Campaner with cover art by Roberta Maria Fernandes. Lyrically the album engages themes of antifascism, anti-colonialism, and opposition to religious hypocrisy, placing the band within the Red and Anarchist Black Metal tradition.

Infectious Offerings was a brutal death metal band from Belo Horizonte, Minas Gerais, Brazil, formed in 2008. The band self-released their debut recording "Intense Desire to Kill" the same year, a two-track offering featuring the title track and "Homicidal Temptations." Their lyrical themes revolved around murder, misanthropy, and slaughter in the tradition of the Brazilian brutal death metal underground.