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".

Cremator is a thrash/black metal band from Derqui, in the greater Buenos Aires province of Argentina, active within the Argentine underground metal circuit since 2013. The band appeared on the "Legion Thrasher Compilation - Argentina Thrash Metal Underground Vol. I" released by Overflesh Records in a limited hand-numbered edition of 250 cassettes, sharing space with acts including Tungsteno, Prozak, and Ammentia.

Crematorium is an active Brazilian thrash/death metal band signed to Satanic Hellbangers Records. The band has contributed to several underground compilations, including The Sound of Satanic Hellbangers Vol. III, and remains a part of Brazil's underground extreme metal circuit.

Criptum is a thrash/death metal band from Formosa, in the remote northeastern province of the same name in Argentina. The band released their album Frenético in September 2015, channeling the aggressive sounds of classic South American thrash.

Critical Terror is a thrash/death metal band from Bogotá, Colombia, formed in 2021. Drawing on themes of anti-religion and Colombian history, they released their debut demo "Renace el Terror" that same year.

Crotalus was a thrash and heavy metal band from Salvador, Bahia, Brazil, active from 2019 until their split-up. The band took their name from the genus of rattlesnakes, and released material independently through Bandcamp. They were part of the underground heavy metal scene in Bahia before disbanding.

Crucifyce is a thrash/groove metal band from Uberaba, Minas Gerais, Brazil, formed in 2016. Their debut album "Freedom Is Gone," released in May 2016, is a 12-track record whose lyrics address themes of war, death, and human fragility, delivered with a raw, aggressive sound rooted in Brazilian thrash tradition. The band features vocalist Tayssa fronting a four-piece lineup active on Bandcamp and streaming platforms.

Damnation City is a speed/thrash metal band from São Paulo, Brazil, signed to Kill Again Records. Drawing influence from the old German thrash school as well as bands like Slayer, Dark Angel, and Razor, the band released the album "Dead and Buried" in 2022, a six-track record covering themes of death, anti-religion, and horror.

Darkest is a thrash/death metal band from São Paulo, Brazil, formed in 2014 and active as an independent act. The band is catalogued in the Encyclopaedia Metallum and maintains a presence on ReverbNation and Bandcamp under the handle "darkestera."