Hellspawn is a death metal band from Natal, Rio Grande do Norte, Brazil, with roots tracing back to predecessor project Sanctifier, which was founded in 1989. The band draws on Cthulhu Mythos themes and released the EP "In Agelessness" (2021) on Old Temple Records, continuing a decades-long tradition of brutal Brazilian death metal.

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.

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.

Heterodoxa is a thrash/death metal and crossover band from Junín de los Andes, Neuquén, formed in 2015 by members known as Mati, Bruno, Jano, and Tincho. The band released a self-titled debut in February 2015 and followed it with the EP "La Tierra Esta en Crisis" in April 2019, both independently released.

Hevnoraak is a Brazilian doom/death metal project formed in 2019. Their debut release Sinking Into Nothingness, issued on February 8, 2019, comprises three tracks — "Tangible Existence," "A Fair Death," and "Ensnared Aura (An Ode to Emptiness)" — establishing a slow, oppressive sound rooted in atmosphere and weight. A cassette edition of the release was pressed by Final Hours of Christ Productions in 2022.

Hexagram is a death/thrash metal band from Batuco, in the Santiago metropolitan area of Chile. The band is unsigned and independent, with lyrical themes centered on religion, death, and slaughter.

Hexerei is a raw black/death metal project from Valdivia, Chile, formed in early 2018 under the banner Kult der Hexerei by Spectre of the Blood Moon. The band released a self-produced demo in February 2019, followed by the split "Hexed Winds of Darkness" (2020) through Infernal Death Productions, and a 2024 career-spanning compilation on Iron, Blood and Death Corporation; their sound draws comparisons to Archgoat and Beherit, built around high-speed blasting, tremolo riffing, and occult, anti-Christian themes.

High School Massacre is a death metal and grindcore band from Curitiba, Brazil, formed in 2011 by Marcelo Mattos and Weliton Lisboa with the explicit aim of writing fast, short songs in the death/grind style. The band self-released a six-song demo in 2012 and followed it with the EP Alienation, recorded at Avant Garde Studio; vocalist Larissa Pires is known for her powerful guttural delivery.

Hocnis is a thrash and death metal band from Belo Horizonte, Brazil, active since 2010. The band released the Demo(niac) in June 2010 and the three-track EP SS Ourang Medan in October 2016, the latter taking its name from the legendary ghost ship story and available across major streaming platforms.