Heléh is a traditional doom metal trio from Córdoba, Argentina, featuring Gonzalo Civita on vocals, Matias Takaya on guitar and bass, and Joahn π on drums. The band released their self-titled debut album on April 6, 2022 — a five-track, 38-minute record recorded and mixed by Takaya at AV Estudio in Córdoba, drawing on the old-school doom of Black Sabbath, Candlemass, and Cathedral.

Hemorragia is a one-man brutal death metal project from Chiloé, in the Los Lagos region of Chile, run solely by Marco Díaz. The project released its debut demo followed by the album "Stench of Obliteration" in December 2025, a release Díaz described as a significant step up in production quality from his initial recordings.

Hemorrhage is a black/death metal band from Volta Redonda, Rio de Janeiro, Brazil, formed in 2012. The trio of Bruni Fidelis on vocals and bass, Jefferson Ferreira on guitar, and Robson Saboth on drums released the five-track EP "The Sinister Path (Formulas do Negative Communication)" in 2018, recorded at Total Produções in Volta Redonda.

Heosphoros is an archaic black metal band from Córdoba, Argentina, formed in 2022 and drawing comparisons to Greek acts like Rotting Christ, Varathron, and Necromantia. Their debut demo "Aster Obscuration" (January 3, 2022) — a four-track cassette release — was picked up for physical distribution by labels including Fallen Temple, Warhemic Productions, and Nuclear Winter Records.

Heptah is a progressive metal band from Campinas, São Paulo, Brazil, formed in 2012. The quintet — featuring vocalists Rhads Clemente and Ricardo Corsi, guitarists Corsi and Samuel Zechin, bassist Robson Baroli, and drummer Raphael Jorge — released their debut album "Master of Delusion" in September 2012, an 11-track record combining heavy riffs with melodic progressive arrangements.

Herege is a death metal/grindcore band from Iúna, Espírito Santo, Brazil, formed in 2016. Their debut album Terra Morta, released in 2016 through Cemitério Records and Cold Art Industry, packs 18 tracks of aggressive grind drawing on influences like Napalm Death, Terrorizer, and Autopsy. The band features Davi Ambrósio on bass and vocals, Everton Oliveira on guitar and vocals, and Juliano Freitas on drums.

Hereticae is a blackened death metal band from Londrina, Brazil, formed in 2015 with lyrical themes rooted in Thelema philosophy and anti-colonialist struggle. The band released their debut EP New Aeon Trinity in 2017, followed by the full-length Ecos do Atlântico in 2020 and a second album, Maior Que Deus, in 2025. Their sound draws heavily from Behemoth, Belphegor, and fellow Brazilian extreme act Sarcófago.

Hermanos de Sangre is a melodic metal band from Buenos Aires formed in 2016 by vocalist/guitarist Martín "Chino" Gastaldi alongside guitarist Pehuén Berdún and bassist Germán Caramanico. The band released their debut album "Hoy no es un Diablo Blanco y Negro" in 2018, followed by "Luminiscencia" in 2020, the EP "III" in 2022, and a self-titled record in 2023.

Hermit's Maze is a Buenos Aires instrumental progressive metal band that debuted in 2017 with the EP "Cyclothyminis" and expanded their sound on the eleven-track full-length "State of Mind" (2019). They followed up with "Every Dream Has Its Bleakness" in November 2020, a five-track release exploring darker atmospheric terrain, and have earned airplay on European and American radio.