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.

Colt.45 is a brutal death metal and grindcore band from Belo Horizonte, Minas Gerais, Brazil. Their 2016 album "Extinction", released through Terceiro Mundo Chaos Discos, drew attention in the underground extreme metal scene for its technically demanding riffs, blastbeat-driven drumming, and vocals ranging from shrieking highs to guttural lows across twelve relentless tracks.

Colônia Cratera is a progressive metal and hard rock band from São Paulo, Brazil, formed in 2017 and named after the ancient meteor crater located in the city's southern outskirts. The band describes their sound as "rock progressivo espacial" (progressive space rock), blending heavy, stoner, and space-influenced elements, with releases including "Flecha e Destino" (2017) and "Templo e Abismo" (2019).

Comando Etílico is a heavy/thrash metal band from Natal, Rio Grande do Norte, Brazil, rooted in the traditional metal sound of the 1980s. The band released their debut EP "Metal e Prazer" in 2007 and their self-titled full-length in 2010, later following up with "Heavy Metal Réu" (2019) and "Flagelo", which earned them the award for best album of 2025 in the Chamas Underground poll.

Comeculebras is a stoner and doom metal band from San Carlos de Bariloche in Argentina's Patagonia region, formed in 2016. The trio of Emilio Contissa on guitar, Federico Agüero on drums, and Fernando Valeria on bass and vocals released their self-titled debut in 2016 and followed it with Río Rojo in 2017, also contributing to the Doomed & Stoned Latinoamerica Vol. II compilation.

Conchaculo is a grindcore band from Buenos Aires, Argentina, known for combining blast-beat intensity with themes of antifascism and dark humor. Active since 2019, they have released a self-titled album in 2018, Blastbeat y Sustancia in 2020, and Las flores del herrero, and appeared on the international Death To Capitalist Grind Vol. 1 compilation.

Confessori is a progressive and power metal band from São Paulo, Brazil, listed on the Encyclopaedia Metallum and active in the city's long-established metal scene. The band plays in the melodic progressive metal tradition that São Paulo has been known for through acts like Angra and Shaman.

Confounded is a death metal band from Recife, Pernambuco, Brazil, formed around 2013 and active in the northeast Brazilian extreme metal scene. The band plays heavy, groove-inflected death metal and maintains a presence on Bandcamp and Instagram under the handle @confoundedband.

Confronto was a deathcore and metalcore band from Rio de Janeiro, Brazil, formed around 2001 and known for politically charged Portuguese-language lyrics. The band released several albums including "Causa Mortis" (2005), "Sanctuarium" (2008), and "Die Young" (2014) before splitting up.