Cruelty Society is a death metal band from Bogotá, Colombia. They released their self-titled Demo EP in 2020, a home-recorded effort covering themes of politics, genetics, and war.

Cruscifire is a death metal band from Atibaia, São Paulo, Brazil, formed in 2005 and rooted in the Brazilian extreme metal underground. The band began with a death/thrash approach before shifting toward a heavier death metal sound, releasing two demos, a full-length, and an EP over their first decade. Their 2016 album Hellspawn, recorded at Undead Studio in Atibaia, showcases eight tracks of raw, unrelenting death metal drawing on classic horror themes.

Crushing Axes is a death metal project from São José dos Campos, São Paulo, Brazil, founded and led by multi-instrumentalist Alexandre Rodrigues. The project is largely a one-man effort, with Rodrigues handling composition, recording, and vocals, occasionally enlisting session musicians for releases. The 2014 album Undead Warrior, featuring session bass and drums, drew praise for its no-frills Brazilian death metal approach blended with groove, with lyrics exploring Norse mythology and the dark side of the human psyche.

Crux Cullum is a death/black metal band from Belo Horizonte, Minas Gerais, Brazil, formed in 2007. The band operates within the underground extreme metal scene of Belo Horizonte, a city with a long tradition of producing extreme metal acts, blending black and death metal elements in their sound.

Cruzdiablo is a heavy metal and hard rock band from Buenos Aires, Argentina, built around vocalist Huija, guitarist Mariano, bassist Mow, and drummer Leo. The band released the album Megalodoom, a record praised for its crushing riffs, groove, and infectious melodic hooks, and appeared on multiple Argentine metal compilations in the 2000s.

Crypta is a death metal band formed in São Paulo, Brazil in 2019 by former Nervosa members vocalist and bassist Fernanda Lira and drummer Luana Dametto, completing their lineup with guitarists Tainá Bergamaschi and Sonia Anubis. The band released their debut album Echoes of the Soul on June 11, 2021 via Napalm Records to widespread acclaim, establishing themselves as one of the most prominent acts in contemporary Brazilian death metal. Their 2023 follow-up Shades of Sorrow further cemented their international profile.

Crystal Lake is a thrash metal band from Leme, São Paulo, Brazil, with roots tracing back to the late 1990s and a current active lineup. The band has released albums including Terror Machine (2007) and Death Row (2018), playing a straightforward traditional thrash metal style. They remain active in the Brazilian underground metal scene.

Crânio is an independent thrash metal band from João Pessoa, Paraíba, Brazil. The band plays aggressive thrash metal and is part of the underground metal scene in the northeastern Brazilian state of Paraíba, with their music available on Bandcamp.

Cubos is a death metal band from Viña del Mar, Chile, who describe their style as "modern old school death metal" and pair it with a pixel art aesthetic. Their debut album "Música para el Fin del Mundo" was released in August 2020 and includes seven tracks, among them "Interludio 8 bit," reflecting their chiptune-influenced visual and sonic identity.