Falecido Morte Lenta is a black/death metal band from Nova Friburgo, Rio de Janeiro, formed in 2024. The band explores themes of terror, nihilism, and evil, releasing the album Possessed by Suffering as their debut statement. Operating as an independent underground act, they contribute to the growing extreme metal movement in the Rio de Janeiro state interior.

Fallen Gabriel is an atmospheric black metal solo project from Rio de Janeiro, founded in 2021 by the musician known as Dominus Gargoyle, who crafts immersive soundscapes exploring themes of melancholy and darkness. The project released The Benevolence of Death in 2021 and followed it with From the Heavens I Fell in 2022, the latter issued on cassette by Rotting Sun Records in 2023. Fallen Gabriel has been highlighted by Phase B Records as one of the notable black metal voices emerging from the Rio de Janeiro underground.

Fallen Idol is a heavy/doom metal trio from Arujá, São Paulo, consisting of Rodrigo Sitta (guitars, vocals), Márcio Silva (bass), and Ulisses Campos (drums). The band has released four full-length albums, including Mourn the Earth (2018) and Weed and Black Candles (2024), the latter self-produced by Sitta with a guest cello appearance by Cielinszka Wielewski. They have also paid tribute to their influences with releases honoring Cirith Ungol (2019) and Black Sabbath (2020).

Fallen Spell is a Brazilian raw atmospheric black metal project, formed in 2015, that explores the unconscious mind and dreamlike states through a blend of abrasive noise and melancholic passages. The project released the full-length Retorno às Sombras in 2025, an eight-track album running approximately 38 minutes, alongside earlier recordings including Ausência Suspensa and the Cold Room demo.

Falsa Luz is a raw black metal and punk unit from Belo Horizonte, Brazil, formed in 2020. The trio, credited under the initials D.C., D.D., and G.N., draws comparisons to acts like Bone Awl, blending tremolo-driven riffs with tormented vocals. Their discography includes the albums Breu Eterno, Por Linhas Tortas, and Vozes Penadas, all self-released through their Bandcamp.

Fantasma is a doom metal band from Dourados, Mato Grosso do Sul, Brazil. Their 2021 demo Drogma featured a lineup of Zumbi on vocals, Vênus on guitar and bass, Hellvuncan on keyboards, and Phantasmagoria on drums, and was recorded at Estúdio Tereré and released through Dark Abyss Records.

Fanttasma is a post-black and doom metal band from São Paulo, Brazil, formed in 2013. Their debut album Another Sleepless Night (2013) featured vocals by Thiago Andrade, drums by Rafael Galbes, and guitars and bass by Rafael Augusto Lopes. The band later shifted toward a more atmospheric rock sound, releasing the album Sailing in 2020.

Far from Everything is a solo atmospheric black metal and ambient project from Brazil, founded by musician Edmilson in 2019. The one-man project has been prolific since its inception, releasing numerous instrumental works including The Howl of the Winds (2024) and collaborating on splits such as The Infinite with BÁL. The project's music blends atmospheric black metal passages with dungeon synth and ambient textures.

Faraon is a one-man black metal project from San Miguel, Buenos Aires, created by a musician known as Temptor Princnegsur. The project released the demo "Testimonios de Esferas Superiores e Inferiores al Sol..." (T.E.S.I.S.) in 2000, a 60-minute eight-track recording blending epic, keyboard-driven black metal with esoteric and Satanic philosophical themes; it was reissued in 2017 by Sons of Hell Prod. after years of obscurity.