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.

Hoctaedron is a death metal band from São José dos Campos, Brazil, formed in 2003. The band released the demo "Celebration of Bloodshed" in 2003, a four-track recording featuring tracks such as "Human Incineration" and "Pleasures of Flesh." The band has since split up but their recordings remain available on Bandcamp.

Hole of Jesus is a black/death metal band from Franco da Rocha, São Paulo state, Brazil, formed in 2019. They released their debut full-length "Rapture to Hell" in October 2019, an eight-track album featuring songs such as "Bowels of Christ (The Blasphemy Is Necessary)" and "Face the Leviathan." The band also appeared on a split release with Necrogosto.

Homúnculo is a death metal and grindcore band from Rio de Janeiro, Brazil, active since 2004. The band has appeared on Brazilian grindcore compilations, contributing tracks such as "O Jardim," "A Resposta," and "Nos Somos A Violencia" to the Horrendous Grindcore Freak Compilation series.

Hon-Ra is a death metal band from Caxias do Sul, Rio Grande do Sul, Brazil, formed in 2012 by Wagner de Moraes, Jener Milani, and Rodrigo Zanella. The band draws on influences including Cannibal Corpse, Deicide, and Slayer, and in 2015 organized the first Hon-Ra Metal Fest in their hometown, bringing together acts from the underground gaúcho scene.

Horda Profana is a bestial black/death metal band from Munro, Buenos Aires, formed in late 2013 by Necromansy (vocals), Lord Nebiros (guitar), Hassthar (bass), and Funeris (drums). They released the full-length Fornicators of Jesus Christ in 2016 and Beyond the Boundaries of Death in 2019 through Sons of Hell Productions, drawing comparisons to Archgoat and Beherit.

Horned God was a death metal band from São Paulo, Brazil, originally formed in 1998 under the name Sacrifice before adopting their definitive name in 2000. The band released their debut album "Absit" in 2001 on Tumba Records, followed by "Chaos, Bringer of All Revelations" in 2003 on France's Listenable Records, and toured alongside Krisiun, Cannibal Corpse, and Monstrosity before splitting up.

Horns of Venus were a metalcore and death metal band from São Paulo, Brazil, formed in 2009 and active until their split. They released two full-length albums: "For the Pressure We Bring" (2009) and "We Are Not Buying Your Shit" (2011), the latter recorded at Bimini Studio in Jundiaí and Master Blaster Studios, blending death metal, grindcore, and melodic hardcore influences across 14 tracks.