COVID-19 is a one-person death metal and goregrind project from Recife, Pernambuco, Brazil, formed in 2020 by the musician Érdos at the outset of the global pandemic. The project uses the pandemic as both name and lyrical subject, channeling the horror of the coronavirus era into brutal extreme metal. Their EP "When the Traditional Margarine Commercial Family Dies" was released digitally through Póstumo Sölstício Records.

Covil is a black metal and dungeon synth project from Curitiba, Brazil, formed in 2022. The project blends raw black metal with ambient and dark dungeon synth atmospheres, releasing the album "Creatures of the Cave" in February 2022 via Floppy Tales Records.

Coágulo is an ambient black metal project from Rafaela, Argentina, active since 2018. The project blends atmospheric texture with black metal darkness, as heard on releases including the 2018 debut Coagulation Times and the 2025 album Angst.

Cracked Skull is a death/thrash metal power trio from Itaúna, Minas Gerais, Brazil, formed in 2014 by former members of Calvary Death and Deadliness. The band combines old-school thrash and death metal with progressive arrangements and socially critical lyrics, debuting with the independently released album "Social Disruption" in 2017.

Craft Sword is a traditional heavy metal band from Buenos Aires formed by Johan, also known from the bands Interceptor and Abomine, alongside vocalist Poli Serafini of Bulletproof — the project wears its NWOBHM and epic metal influences openly, citing Manilla Road, Omen, and Blitzkrieg as touchstones. They released their debut EP "The Furious The Savage The Wild" in February 2021, followed by the eight-track album "Hyborian Age" in September 2022, both drawing heavily on sword-and-sorcery themes.

Craneo is a thrash/death/groove metal band from Corrientes, Argentina, whose lineup includes Walter Gómez on vocals, Ariel Flores on guitar, David Vallejos on bass, and Ariel Duarte on drums. They released a six-track demo in March 2020 and appeared on the compilations "Medellín Death Zone Vol. 1" and "Death To Capitalist Grind Volume One" with tracks including "Cura crucificado" and "Eres cadáver".

Cranial is a death metal and grindcore band born in Viña del Mar, Chile in 1994, making them one of the longer-running extreme metal acts in the country. The band has released material across several decades, with their 2024 single "Canon" featuring guest drummer Marco Pitruzzella marking a return to activity.

Cranial Crusher is a thrash/crossover punk trio from São Bernardo do Campo, São Paulo, Brazil, active since around 2010. The band blends thrash metal with crust punk and hardcore, and has released the EPs "Necrópole" (2016) and "Putrefakt" (2018), along with their debut full-length "Ciclo da Degradação" in 2023.

Cras is a sludge metal band from São Paulo, Brazil, formed around 2019 and known for blending sludge, doom, and hardcore influences. The band released their debut EP "Desperato" as the first installment in a planned trilogy, drawing comparisons to Brazilian underground acts and featuring guest appearances from members of Torture Squad.