C.R.U.E (Comando Resistência Underground Extremo) is a black/death metal band from São Paulo, Brazil, active within the city's underground extreme metal scene. The band is signed to Brazilian Ritual Records, under whose banner they released a split with fellow São Paulo act Transgressor featuring their material "Metal das Ruas" in 2021. Their music is rooted in the raw, aggressive tradition of Brazilian underground metal.

Cabo de Hornos is a death metal and grindcore band from Monteros, Tucumán, Argentina, featuring Alberto on guitar and vocals, Marco on guitar, Francis on bass, and Tigre on drums. The band released their album Let Them Die, a blunt and uncompromising assault that represents the extreme underground of Argentina's northwestern provinces. Their sound sits at the intersection of grinding brutality and death metal heaviness.

Cactek is a deathrash project from Rio de Janeiro, Brazil, formed by guitarist Pedro de La Rocque with the aim of channeling the raw energy of early death and thrash metal. The band released their debut EP "Sunrise in Hell" in September 2023, produced by Dan Swanö, and was featured among ten notable underground Brazilian acts to watch in 2024. Their sound blends technical thrash with death metal aggression in the tradition of the classic Brazilian extreme metal scene.

Caixão is a black/death metal band from Salvador, Bahia, Brazil, operating in the vein of Sarcófago, Hellhammer, Bathory, and Sodom with lyrical themes of death, anti-Christianity, and anti-cosmic Satanism. The band released the demo "Black Coffin Entities" and has issued further material including splits and a full-length album, "Herakles / Melqart," released on vinyl through Nuclear War Now! Productions in January 2025. They are currently signed to Diabolous Productions.

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).

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.

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 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.

Caosamorts is a thrash/death metal band from Campinas, São Paulo, Brazil, formed in 2014. Drawing influence from acts like Slayer, Carcass, Napalm Death, and Brazilian legends Dorsal Atlântica, they write Portuguese-language lyrics centered on themes of war, corruption, violence, and intolerance. The band has released demo material available on Bandcamp.