Chaos Synopsis is a thrash/death metal band from São José dos Campos, São Paulo, Brazil, formed in 2006. The band has released multiple full-length albums including Kvlt ov Dementia (2009), Art of Killing (2013), Seasons of Red (2015), and Gods of Chaos (2017), and has toured in both Brazil and Europe. Their approach blends thrash and death metal while drawing thematic concepts from each album — ranging from madness and serial killers to historical conquerors.

Chemical Disaster is a death metal band from Santos, São Paulo, Brazil, formed in 1993 out of members of the local thrash band Ignorance. Their debut album "Resurrection" was released in December 1993 on Cogumelo Records, followed by "Scraps of a Being" (2000) and "Third Wound" (2011) on Violent Records. The band's sound blends chunky, mid-paced death metal with aggressive riffing and remains active as one of the most enduring extreme metal acts from the Santos coastal region.

Child o' Flames is a melodic thrash/death metal band from Curitiba, Paraná, Brazil, formed in the mid-2000s. The band draws heavily from melodic death metal and has shared stages with international acts such as Sepultura, Misfits, Biohazard, Suicidal Tendencies, and Grave Digger. In 2020 they returned from a hiatus with the single "Reach Out The Sky" and the album "A New Rising," which was nominated in the Best Album category at Brazil's Roadie Crew annual awards.

Cicuta was a death metal band from Santo Antônio de Jesus, Bahia, Brazil, that has since split up. The duo — comprising Pedro Rodrigues on bass, synths, and vocals, and Sérgio Gregório on drums — released a self-titled album with nine tracks. Their music represented a raw, underground strain of Brazilian death metal from the interior of Bahia.

Clamatorius is a black/death metal band from Goiânia, Goiás, Brazil, originally active from 1999 to 2005 under their own name after an earlier incarnation as Postumus (1998–1999). The band is notable for fusing extreme metal with Christian lyrical themes and released the five-track album "Consummatum Est" through Blackened Label Records.

Clan dos Mortos Cicatriz is a death-punk band from Curitiba, Paraná, Brazil, blending raw black metal, death metal, and hardcore punk into what the underground has called "nekro-hardcore." The band released their debut album "Técnicas de Morte" in March 2025 via Sentient Ruin Laboratories, a 15-track, 25-minute record described as a grim manifesto drawing imagery from slums, prisons, morgues, and war zones.

Clemency is a Christian death metal band from Londrina, Paraná, Brazil. The band released the demo "Satan's Funeral" (1998) and the full-length "Spiritual Domination" (1999), the latter reissued in 2019 via Warriors Records and Eirene Records. Their lyrical themes centered on Christianity, distinguishing them within Brazil's death metal underground.

Coagulo was a death metal band from San Juan, Argentina, formed in 2015 and later split up. The five-piece lineup featured Julián Ibars on vocals, Martín Manrique and Julio Rosales on guitars, Elías Vega on bass, and Daniel Fernández on drums.

Coldblood is a death metal band from Rio de Janeiro, Brazil, originally formed in 1992, with themes rooted in Satanism and anti-Christianity. After two break-ups and a permanent reformation in 2005, the band released their debut full-length "Under the Blade I Die" in 2007, followed by "Chronology of Satanic Events" (2013) and "Indescribable Physiognomy of the Devil" (2016), the latter released through Selfmadegod Records.