Claustrofobia is a death/thrash metal trio from Leme, São Paulo, Brazil, formed in 1993, and widely regarded as one of the most important underground extreme metal bands to emerge from Brazil. The band has toured extensively through South America, Europe, and the United States — sharing stages with Slayer, Iron Maiden, Sepultura, and Napalm Death — and has released a string of albums including "Fulminant" (2005), "I See Red" (2009), and "Unleeched" (2022).

Clava is a death/thrash metal and hardcore band from São Paulo, Brazil, formed in 2024. The band operates in the tradition of Brazilian extreme metal crossover and is listed as active on Metal Archives. As a very recently formed act, they have yet to accumulate significant press coverage beyond their initial registration.

Cobalto was a thrash metal band from Salvador, Bahia, Brazil. The band's lyrical themes encompassed politics, evil, and darkness, and they released the album "Elemental" on Torto Fono Gramas before eventually splitting up. They are listed on Metal Archives as a defunct act.

Coliseum is a black/death/thrash metal band from Salvador, Bahia, Brazil. The band operates as an independent act within Salvador's extreme metal underground, combining elements of black metal, death metal, and thrash into their sound.

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.

Conquistadores is a thrash/heavy metal band from Osasco, São Paulo, Brazil, formed in 2016. The band performs Portuguese-language metal, with tracks such as "Lutar e Conquistar" and "Guerreiros do Metal" reflecting themes of battle and metal pride. They have played live at local São Paulo-area venues including Arena Metal SP and remain active on the regional scene.

Conspiracy was a death/thrash metal band from Presidente Prudente, São Paulo, Brazil, active in the early 1990s before splitting up. The band was an independent act within the Brazilian extreme metal underground scene of that era. They are documented on Encyclopaedia Metallum as part of the wave of São Paulo-interior bands that emerged alongside the broader Brazilian thrash and death metal movement.

Corpsehammer is a Chile/Sweden collaborative death/black/thrash metal project based in Dalarna, Sweden, featuring members from Swedish black metal band Omnizide alongside Chilean collaborators. The band issued three EPs in rapid succession — "Sacrilegio" (2017), "Posesión" (2017), and "Perversión" (2018), all as limited cassette runs — before consolidating them into the compilation "Sign of the Corpsehammer" (2019) and releasing their debut full-length "Metal de la muerte" via Bestial Invasion Records the same year, a record drawing heavily from Hellhammer, Sarcófago, Celtic Frost, and Darkthrone.

Corpsy is a death/thrash metal band from Itabaianinha, Sergipe, Brazil, formed in 2022 and currently active as an independent act. The band operates within the extreme metal underground of northeastern Brazil.