Cão do Inferno de Quaresma was a short-lived raw black metal project from São Paulo, Brazil, active in 2022–2023 before splitting up. The project was led by Lady Svarta on vocals, with Mask of Darkness handling all instruments, and released a self-titled album in July 2022 as well as appearing on the Podreira Records "4 Way Split" compilation in December 2022.

Cérbero is a power/speed metal band from São Paulo, Brazil, listed on Metal Archives with an active status. The band plays fast, aggressive metal in the power and speed metal tradition and has released material available on Bandcamp. They share a name with a separate split-up thrash metal act from Recife, Pernambuco.

Cérebro de Galinha is a crossover/thrash hardcore band from Marabá, Pará, Brazil, formed around 2015 and operating independently. The band plays aggressive, politically charged material and has released two albums: "Sociedades Secretas" (2018) and "Norte em Chamas" (2021).

Céu em Chamas is a melodic death metal and metalcore band from Itapira, São Paulo, Brazil, formed in 2014. The band draws from a wide range of extreme music including punk, hardcore, grindcore, and thrash while maintaining a melodic core, and released their debut EP "Sopro da Destruição" in 2014 followed by the full-length "Infernal" in 2017, recorded at Black Stone Studio.

Círculo Polar is an Argentine black metal project that released the album Atemporal in 2015, establishing the band's raw and atmospheric approach to the genre. The project has maintained an underground presence through its Bandcamp page, where tracks such as Mar Muerto reflect a cold, minimalist black metal aesthetic.

Código Clone is a progressive metal band from São Paulo, Brazil, formed around 2018. The band plays heavy instrumental progressive metal with influences drawn from neoclassical music, jazz, and Brazilian styles, and released a self-titled EP featuring tracks such as "Comfort From a Bomb" and "Dreaming with Spiders." Reviews have praised their versatility, precision, and compositional depth within the Brazilian progressive metal scene.

Cöffin Röt is a death metal band from Franca, São Paulo state, Brazil, formed in 2021. The band describes their style as "necromantic death metal" and released the compilation "Dawn of Decay – The Demos" in 2021 through their Bandcamp page. They are an active underground act operating out of the Brazilian interior metal scene.

Cülpado is a death/thrash metal project from Curitiba, Paraná, Brazil, founded in 2021 by Jefferson Verdani, a drummer known from bands including Murdeath, Axecuter, and Sad Theory. Operating largely as a one-person effort, Verdani composed, recorded, and performed all instruments and vocals on the debut album Romper da Realidade, released on December 15, 2021 via Kill Again Records. The album's lyrics draw from the crimes of Brazilian serial killers, with the title inspired by a phrase used by forensic psychiatrist Guido Arturo Palomba.