Great Vast Forest is a black metal band from Lages, Santa Catarina, Brazil, founded by Surgath in 1994 and one of the earliest acts in the Brazilian black metal underground. Describing their sound as "Barbarian Black Metal" — aggressive and cold yet melodic — the band released their debut album "Battletales and Songs of Steel" in 2002, followed by "From the Dark Times to the Black Metal Legions" in 2017.

Grimörio is a black metal band from Rio Grande do Sul, Brazil, with roots tracing back to 2011. The band is listed on Encyclopaedia Metallum with the release "Prophetiae" among their discography, operating as an independent underground act.

Grisvelos is a one-man black/death metal project from Osorno, Los Lagos, Chile, created by Alfredo Torres, who also plays bass and backing vocals in the black/thrash band Degotten. The project debuted in August 2020 with the full-length "Desperatio," a nearly 50-minute album drawing from the influence of Morbid Angel, Immolation, and Marduk while channeling the band's description of Osorno as a cold, decadent city into music that blends ferocity with melodic, nostalgic atmosphere.

Górmain was a bestial black metal project from Mogi das Cruzes, São Paulo, Brazil, active from 2021 to 2023. Beginning as a one-man band, the project released a series of demos rooted in first-wave black metal and war metal, including 'Chaos, Collapse, Anarchy!' (2021) and 'Global Annihilation', drawing on influences such as Blasphemy, Beherit, Sarcófago, and Bathory.

Haeretic Winds is a black metal band from Teresina, Piauí, Brazil, active since around 2009. The band's themes center on anti-Christianity, Satanism, occultism, and war, operating as an independent underground outfit. Their releases include the EP Derrame o Sangue dos Puros and the recording Avante Tropas de Lúcifer.

Hairetikos is a black metal band from Moreno, Buenos Aires, formed in 2024, comprising vocalist Nestor, guitarist Alex, bassist Juan, and drummer Guido. Their debut EP L'eremita, recorded and mastered by Eduardo Casella at Estudio En La Nada in Moreno during winter 2024, was released on December 15, 2024, through La Resistencia Distro, and features seven tracks including Transmigración Cósmica and La Consagracion del Temor.

Hammergoat is a bestial death/black metal band from São Paulo, Brazil, featuring members associated with the Brazilian underground acts Evil and Dethroned Christ. The band released their debut full-length, Regeneration Through Depopulation..., in 2010 on Hammer of Damnation, a 30-minute assault drawing comparisons to Blasphemy and Hellhammer and including a cover of Sarcófago's "The Black Vomit." They also appeared on a split cassette with Swiss act Dakhma, released in 2018.

Hass is a black metal project originating in Joinville, Santa Catarina, Brazil, formed in 2001 by the solo musician Enmys. The band has built an extensive catalogue of raw black metal releases, including the albums Unmoralisch Black Metal (2003), Unprocessed Dementia (2011), and Applause (2013), with activity continuing through subsequent years.

Hastio is a black metal and punk band from Buenos Aires that formed in 2015, playing short, raw tracks typically under two minutes. They released the SATVRNALIA EP on December 24, 2016, recorded at Electric Chesterland Studios, followed by their self-titled album on January 6, 2019, recorded and mixed at Estudios Del Valle by Nahuel Martinez. The self-titled album features seven tracks including "Combate," "Yog Sothoth (El señor de la galaxia)," and "Los ojos eternos."