Confiteor is a heavy metal band from Salvador, Bahia, Brazil, formed in 2018 and active within the city's growing metal scene. The band performs traditional heavy metal and is registered in the Encyclopaedia Metallum as part of the Brazilian heavy metal underground.

Corsário is a heavy metal and progressive metal band from Belém, Pará, Brazil, formed in 2016. The band describes itself as "Heavy/Prog da Amazônia para o Mundo" (Heavy/Prog from the Amazon to the World), blending traditional heavy metal with progressive elements rooted in the Amazon region's musical identity. They remain active and release music through Bandcamp.

Cova Rasa is a heavy metal band from São Paulo, Brazil, founded by guitarist Jayme Danko and keyboardist Collins Freitas. The band plays traditional heavy metal with horror-themed lyrics drawing on urban legends, serial killers, and supernatural narratives, and has released albums including "Deadline" (2018), "Cruzando Infernos" (2020), and "Another Time" (2025). They have served as opening act for international touring acts including Rhapsody of Fire and HammerFall in Brazil.

Craft Sword is a traditional heavy metal band from Buenos Aires formed by Johan, also known from the bands Interceptor and Abomine, alongside vocalist Poli Serafini of Bulletproof — the project wears its NWOBHM and epic metal influences openly, citing Manilla Road, Omen, and Blitzkrieg as touchstones. They released their debut EP "The Furious The Savage The Wild" in February 2021, followed by the eight-track album "Hyborian Age" in September 2022, both drawing heavily on sword-and-sorcery themes.

Creatures is a traditional heavy metal band from Curitiba, Paraná, Brazil, founded by guitarist Mateus Cantaleano and vocalist Roberto Scienza in 2019. Drawing on the sounds of '80s acts like Enforcer, Saxon, and Dokken, the band signed with Polish label Iron Oxide Records and released their self-titled debut album in October 2021, standing out in Brazil's extreme-metal-dominated scene by championing classic heavy metal.

Crime is a duo from Santiago, Chile, whose sound draws equally from classic rock 'n' roll acts like Rose Tattoo and Motörhead and '80s punk. The band released their debut EP "First Crime" through German underground label Dying Victims Productions in 2018, followed by the "Wrong Woman Demo LP" in 2024.

Criptal is a heavy metal band from General Pacheco, in the Buenos Aires province of Argentina. Their discography on Metal Archives includes the albums El amanecer de la esperanza and Contra toda tempestad, the latter released in 2014.

Crossover was an Argentine heavy metal act whose Bandcamp catalogue includes the albums Funeral Flowers and Fantasmo, along with the sprawling release Cryptic and Dire Sallow Faced Hoods Blast Off into Oblivion. The band is listed as split-up on Metal Archives after operating under the Darkbeat banner.

Crotalus was a thrash and heavy metal band from Salvador, Bahia, Brazil, active from 2019 until their split-up. The band took their name from the genus of rattlesnakes, and released material independently through Bandcamp. They were part of the underground heavy metal scene in Bahia before disbanding.