Crashkill is a thrash metal band from Fortaleza, Ceará, Brazil, formed in 2016. The band released the EP "Hate Zone" in 2017 and followed it with their debut full-length "Consumed by Biomechanics" in 2020, delivering aggressive, riff-driven thrash metal in the tradition of the Brazilian extreme metal scene.

Crehate is an independent thrash metal band from Curitiba, Paraná, Brazil, listed on the Metal Archives and active under the name Born CreHate. The band plays thrash metal with lyrical themes centered on war, politics, and social issues.

Cremation Pyre is a three-piece thrash/black/death metal band from Santiago, Chile, active since the late 2010s. The band recorded their rehearsal session "The Flame Begins" in 2018 and followed it with their self-titled EP in September 2019, which was recorded and mixed by B. Barrantes at Necrotic Studios, featuring original material alongside a cover of Schizo's "Electric Shock".

Crente is an extreme metal band from João Pessoa, Paraíba, Brazil, formed around 2022–2023 by members including Juan Apolinario (ex-Insecticida) and Marciel Argentina (Tiranicídio). The trio blends death and thrash metal under the sardonic self-description of "extreme gospel music," and released the compilation album Analects in October 2023, collecting their recorded output up to that point.

Criminal Mosh is a thrash/crossover metal band from São Paulo, Brazil, formed in the late 2000s. The independent act plays politically charged thrash and crossover, carrying on the aggressive street-level style that has long been part of São Paulo's underground metal scene.

Criogenia is a heavy/thrash metal band from Caseros, in the Buenos Aires province of Argentina, with roots stretching back to the early 2000s. They released the EP "Almas del mundo" featuring tracks including "Siempre presente" and "Salvaje", followed by the full-length "Even Worst" in 2009, building a body of work in the tradition of Argentine underground metal.

Cristo is a groove/death/thrash metal band from Río Cuarto, Córdoba, Argentina, formed in 2023. The band released a self-titled EP available on their Bandcamp page, carving out a heavy, riff-driven sound within the Córdoba metal scene.

Critical Fear is a thrash metal band from Iracemápolis, São Paulo, Brazil, formed in 2008–2009. Signed to Thrash or Death Records, the band focuses on political and social themes and has released multiple records including Conflicts (2011), Alone (2016), and A Real Danger (2022).

Critical Mass is a thrash metal band from São Paulo, Brazil, originally formed in 1989 under the name Sarcastik before adopting their current name, drawing influence from acts like Metallica, Testament, and Nuclear Assault. After nearly three decades of dormancy during which their early material remained unreleased, the band returned to resurrect compositions written between 1990 and 1994. In 2025 they released their debut EP "The Feast" on streaming platforms and in a limited CD edition, marking their long-awaited comeback to the São Paulo underground scene.