Cefem is a heavy metal band from Casilda, Santa Fe, Argentina, that released three recordings in quick succession: the album Historias Oscuras in April 2016, Pateando con el Rock n' Roll in September 2016, and Rictus Umbrio in November 2017. Their lyrical themes draw on myths, urban legends, and ancient literary sources, lending their straightforward heavy metal a distinctly eerie character. Tracks like "La Hija Malvada" and "El Farol del Diablo" from Rictus Umbrio showcase the band's appetite for dark storytelling within a classic Argentine metal framework.

Christian Alejandro is an instrumental progressive metal solo project from Coquimbo, Chile, whose debut EP "Per Seculum Seculorum" (2010) introduced five tracks of self-described "Instrumental Epic Prog Metal." The project's 2023 album "G.NEM" expanded the approach into a ten-chapter conceptual work featuring guest soloists and a closing title track that runs over sixteen minutes.

Chronicode is a heavy metal band from Rio de Janeiro, Brazil, formed in 2016 and currently on hold. The band features a lineup including vocalist Mariana Figueiredo and guitarists Julia Pombo and Celo Oliveira, and operated as an independent act with themes centered on fighting spirit, personal change, and the consequences of wrongdoing.

Chronos is a heavy/thrash metal band from Santiago with roots stretching back to 1983, when founders Claudio Martínez and José Ihnen formed the group that would release the influential "Medieval Tales" demo (1986) and the album "A Dónde Vas" (1989) before disbanding. The band reunited and resumed activity in 2007, releasing the self-titled full-length "ChronoS" in 2009; drummer Eduardo "Topo" Topelberg, a member across multiple eras, also played in fellow Santiago institution Pentagram Chile.

Chykle is a heavy metal band from Buenos Aires, Argentina with roots going back to the mid-1980s, when they released albums including "Relámpago de Rock" (1986), "Nave Acuario" (1987), and "Jaque Mate" (1988). The 1988 album "Jaque Mate" featured tracks such as "Caviar y Champagne," "Hiroshima Enola Gay," and "Alma de Rock and Roll," and the band's lineup at that time included vocalist Olaf Mangialavore, guitarist Edy Valino, bassist Bugy Bogao, keyboardist Frank Mangialavore, and drummer Micky Llade. The band has remained part of Buenos Aires's heavy metal scene across several decades.

Circadia is a heavy metal and hard rock band from Catriel, Río Negro, Argentina, drawing on classic 1980s and 1990s metal influences. The band has released recordings including the singles Leonidas and the EP Sucesos, building a following in the Patagonian underground metal scene.

Clenched Fist is a heavy metal band from the Jardim São Luís neighborhood in the south zone of São Paulo, Brazil. Drawing influence from classic 1970s and 1980s acts including Black Sabbath, Iron Maiden, and Dio, the band plays heavy/speed metal with lyrical themes touching on society and medieval imagery. They have released the albums "Homenagem aos Bravos" (2008) and "O Presente da Morte" (2012) and are signed to Infernö Records.

Coldness is a heavy metal band from Fortaleza, Ceará, Brazil, formed in 2012 and operating as an independent act. The band explores themes of human feelings, life, and personal reflection in their music, and had a track featured on the Terrorizer Magazine South America sampler "Fear Candy" in 2017.

Conan was a heavy metal band from Mar del Plata, Argentina, active from 2007 until their breakup. The band released a live recording titled En Vivo and built a following within Argentina's coastal heavy metal scene before eventually disbanding.