Fuck the Law is a doom/death/stoner metal band from Rio de Janeiro, Brazil, formed in 2014. Citing Black Sabbath, Celtic Frost, Cathedral, Entombed, and Napalm Death as primary influences, the band crafts a heavy, riff-driven sound that blends traditional doom with death metal weight.

Fuego Interior is a deathcore and metalcore band from Buenos Aires, Argentina, who released their debut full-length "El Camino Más Difícil" in 2013, a nine-track album running roughly 34 minutes. Over a decade later they returned with their second album "Los Límites de la Realidad" (2024), incorporating djent elements and dense breakdowns alongside their established groove.

Fuentealba is a Buenos Aires stoner/doom trio consisting of Mario Banega on guitar and vocals, Federico Pelfini on drums, and Gonzalo Vazquez Ubiedo on bass. The band released their debut EP "Presente" in December 2019, followed by "Fuentealba Km 0" (2022) and the three-track release "Mazmorras" in November 2024.

Fuenteovejuna was a Buenos Aires groove/death metal band that released a self-titled four-track album on July 9, 2018. The band blended groove metal and death metal with elements of thrash, and split up after a short run.

Fuerza Oculta (released under the name Fuerzas Ocultas on Bandcamp) was a heavy metal band from Rafaela, Argentina, who released a self-titled album on August 1, 2018. The band has since split up, leaving behind this sole recorded output from their brief existence.

Fulanno is a stoner/doom metal trio from Coronda, Santa Fe, Argentina, consisting of Fila Frutos on guitar and vocals, Mauro Carosela on bass, and Jose A on drums. The band built an international cult following through their albums "Velas Negras" (2018) and "Nadie Está a Salvo del Mal" (2020), and returned in 2025 with "Nosotros Somos el Fin del Mundo" via Interstellar Smoke Records.

Fullgore is a death/thrash metal band from Vila Velha, Espírito Santo, Brazil, founded in mid-2002 by guitarists André Nideck and Gustavo Souza alongside drummer Marcus Vinicius. The band released their debut demo Blessed Sacred Blast in December 2003, a live-recorded effort praised for its tight blend of death and thrash metal.

Fullrage is a heavy/thrash metal band from Porto Alegre, Rio Grande do Sul, Brazil, formed in 2020. They released their debut album, Resurrection Denied, in 2021 through True Metal Records — a ten-track effort with mix and mastering by Ben Hur Lima and cover artwork by Marcelo Vasco.

Fulminante is a thrash/death metal band from Pombos, Pernambuco, Brazil, formed in 2018. The band has released several independent recordings including the EP O Início do Fim, tracked at InTocas Studio in Caruaru, and the EPs Liberte a Besta and Fuerza y acero, both released in 2023.