Cabo de Hornos is a death metal and grindcore band from Monteros, Tucumán, Argentina, featuring Alberto on guitar and vocals, Marco on guitar, Francis on bass, and Tigre on drums. The band released their album Let Them Die, a blunt and uncompromising assault that represents the extreme underground of Argentina's northwestern provinces. Their sound sits at the intersection of grinding brutality and death metal heaviness.

Cachorro da Duença is a grindcore band from Caruaru, Pernambuco, Brazil, formed in 2014. The band channels political indignation and social critique — addressing themes of religion, self-management, and human freedom — through short, furious bursts of extreme music. Their releases include the demo "Degradação Humana" (2014) and the split "4 Ways to Grind" (2017), and they have participated in international underground compilations.

Cancerous Social Thoughts is a grindcore band from Asunción, Paraguay, formed in 2017 and released through Grinder Cirujano Records. Their 2017 full-length Distopía and 2021 split Grindkaos deal in themes of political unrest, social oppression, mass destruction, and anti-religion, delivered in the blasting, concise format typical of the genre. They are one of the few active grindcore acts documented from Paraguay's underground extreme metal scene.

Carnal Atrocity is a death metal/grindcore duo from São Paulo, Brazil, formed in 2020 and comprising Karine Campanille (vocals, guitar, bass, synths) and Emiliano Borges (drums). The band released their debut album "Degenerescência" in June 2020, recorded at Estúdio Mitra and mixed at Crossroads Studio in São José dos Campos, São Paulo.

Carnal Blasphemy is a death metal and grindcore band from Bogotá, Colombia, formed in 2005 and currently signed to Gore House Productions. They released their debut full-length Liars Made Authority in 2015 and have remained active in the Colombian extreme metal underground, with appearances on compilations including Extreme Magazine's Colombian Metal sampler series.

Carnicero is a death metal/grindcore band from Jundiaí, São Paulo, Brazil, catalogued on Encyclopaedia Metallum as a split-up act. The band's lyrical themes encompassed horror, subconscious depravity, death, and atheism, situating them in the tradition of São Paulo's extreme underground scene.

Choke is a groove/death metal and grindcore band from Curitiba, Paraná, Brazil. Signed to Top Music Brazil, the band's lyrical themes center on death, misery, and social unrest, and their early releases include the demo "Dictatorshit Holocaust from Third World" (1999) and the split CD "Manifest" (2001) with STN, followed by "Slum Radio" in 2003.

Clint X Eastwood is a raw black metal and grindcore band from Catanduva, São Paulo, Brazil, formed in 2023. The band's lyrical themes revolve around Clint Eastwood films, an unusual conceptual hook within the Brazilian underground extreme metal scene. They released a self-titled demo in May 2023, available on Bandcamp.

Colapso was a grindcore and crossover band from Recife, Pernambuco, Brazil, active from 2004 until splitting up around 2007. The band recorded their first demo "É o Fim" ("It's the End") in 2005 with eleven tracks, and later released a split with fellow Recife act Corroídos pelo Ódio in late 2006 that gained wider circulation across Brazil. The group disbanded after members departed to pursue other musical projects.