Cancerbero is a death metal band from Concepción, Chile originally formed in 1987, releasing two early demos — Guardian of Hell (1988) and Perpetual Agony (1991) — before disbanding in 1994 and reforming in 2001. The band delivers old-school death metal rooted in the raw, thrash-inflected aggression of the late 1980s, and has released three full-lengths: At the Portal of Evoked Blasphemies (2012), Reconquering the Throne of Death (2019), and Sempiternal Decay (2025).

Cancerous Social Thoughts is a grindcore band from Asunción, Paraguay, formed in 2017 and released through Grinder Cirujano Records. Their 2017 full-length Distopía and 2021 split Grindkaos deal in themes of political unrest, social oppression, mass destruction, and anti-religion, delivered in the blasting, concise format typical of the genre. They are one of the few active grindcore acts documented from Paraguay's underground extreme metal scene.

Canilive is a death metal band from Rio de Janeiro, Brazil, active since 2011. The band plays technical, heavy death metal with grindcore influences, and released their debut EP "Psychosomatic Schizo" in 2016 after a period of hiatus and lineup changes. They are an active presence in the Rio de Janeiro underground metal scene.

Canis Lupus is a black metal band from São Paulo, Brazil, currently on hold. The band's lyrical themes revolve around anti-religion, philosophy, and paganism, and they have released two EPs — "Join the Pack" and "Burn Again" (2014) — showcasing a raw, traditional black metal approach. Their music is available on Bandcamp under the handle canislupus666.

Cantera is a death metal band from Posadas, Misiones, one of the few extreme metal acts to emerge from Argentina's northeastern Mesopotamia region. The band has appeared on the regional compilation Posadas bajo tierra alongside fellow Misiones acts Sadistica, Najash, and Lobregal, documenting the underground metal scene of the city.

Caos Devasta is a death/thrash metal band from Manaus, in Brazil's Amazon region, formed in 2017. The band is part of the active underground heavy metal scene in Manaus and has performed at local events including the Mandrake Rock Festival, which showcases original Amazonian metal acts. Their album "Amazônia Destruída" is documented on Metal Archives.

Caos Onipresente is a blackened death metal duo from Nova Odessa, São Paulo, Brazil, formed in 2020. The project blends black metal and death metal with experimental elements, and released the album "Ser Humano: Aversão" in early 2020. Their music is available on Bandcamp.

Caos ov Doom is a doom/death metal band from Medellín, Colombia, formed in 2021 and signed to Leçons des Ténèbres Productions. They released their debut EP Tardissime Mortem Fuga in 2022, followed by their first full-length Magnum Opus Tenebrarum in 2023, with lyrics and themes centered on death, dark poetry, and melancholy.

Caos Sphere is a heavy/thrash metal band from Recife, Brazil, formed in 2014. The band released the EP "Horror Tales" as their debut, followed by the full-length "Hell Is Here" and the album "The Call of Thanatos" in 2016, delivering a style built on palm-mute chugging, dexterous riffing, and aggressive vocals in the tradition of classic Brazilian thrash.