Finally Doomsday is a death/thrash and grindcore band from Porto Alegre, Rio Grande do Sul, formed in 2011. The band has released at least two recordings available through their Bandcamp page, including the split Healed for Today / Guess What? and the full-length Post Nuclear Armageddon. Their sound draws on the crossover traditions of extreme metal that have long been rooted in the Brazilian south.

Forbidden Ideas... is a death/black metal and grindcore band from São Paulo, Brazil, conceived in 2003 by vocalist Bizarro and guitarist Claudio Czarnobai. The band debuted with the demo "Choking With Shattered Glass" in 2005 and went on to appear on the Violent Records compilations Endless Massacre III (2009) and Endless Massacre V (2013). Their lineup also includes bassist Fernanda Czarnobai and drummer João Leonel, with vocalist Diego Parmito joining in 2008.

Fossilization is a death/doom metal duo from São Paulo, Brazil, formed around 2020–2021, featuring members also known from the sludge/doom band Jupiterian. The band debuted with the EP He Whose Name Was Long Forgotten in 2021 on Everlasting Spew Records, followed by the full-length Leprous Daylight in 2023 and the sophomore album Advent of Wounds in February 2026, all released through Everlasting Spew.

Frieza is a death/post-metal band from Goiânia, Goiás, Brazil, formed in 2017, consisting of Júlio César Baron on drums, Augusto Scartezini on guitar and vocals, and Marco Túlio on bass. The band released their self-titled debut album in March 2017, recorded and mixed between December 2016 and February 2017 at Complexo Estúdio and mastered by Gustavo Vazquez. Their sound melds the heaviness of death metal with the atmospheric sprawl of post-metal.

Frustrated Existence is a death/thrash metal solo project from Poço Fundo, Minas Gerais, Brazil, driven by multi-instrumentalist Ruben Alvim, who handles guitars, bass, and vocals. The project released its self-titled debut album in July 2023, a 11-track record recorded between November 2021 and February 2022 in a home studio, with tracks including "Shortcuts to Slavery" and "Implode this Damned System."

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.