Calvario is a groove metal and metalcore band from Ituzaingo, Buenos Aires, Argentina, active since 2016. The band self-released their debut self-titled album through their Bandcamp page, establishing a heavy, riff-driven sound that sits between the rhythmic punch of groove metal and the aggressive structures of metalcore. They remain an active presence in the Buenos Aires underground metal circuit.

Calvário is a heavy/doom metal band from Carapicuíba, São Paulo, Brazil, originally formed in 1990 under the name Calvary. The band holds the distinction of being the first Brazilian Christian metal act to release a full-length album, and has been active across several periods since their founding, currently signed to Blood & Iron Records. They were featured in the Brazilian metal fanzine U’loco as early as 1991, cementing their place as pioneers of Christian heavy metal in Brazil.

Camembert was a thrash metal band from Buenos Aires, Argentina, operating as an independent act in the 1990s Argentine thrash underground. The band evolved from an earlier project called Lacrimosa and contributed the track "El corazón" to the 2000 compilation Hermandad metálica vol. 2, one of the key documents of the Buenos Aires thrash scene of that era. They later split up, leaving a modest but documented footprint in the local extreme metal archive.

Campo Minado is a thrash/crossover hardcore band from the Recife/Olinda area of Pernambuco, Brazil, active since 1998. The band’s lineup of Adriano (vocals), Markelly (guitar), D’Angelo (bass), and Marcelo (drums) has released a self-titled debut album (2001), the EP “Curto e Grosso” (2013), and the album “Extinção” (2016), delivering aggressive, politically charged thrash with a hardcore edge.

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.