Flaming Blood is a self-described heavy metal band from Simão Dias, Brazil. The band released their self-titled debut EP "The Fires's Calling" in January 2016, a seven-track digital release featuring songs such as "Battlefield," "Marks of Time," and "The Reaper."

Flashover is a thrash metal band from Brasília, Brazil, formed in the mid-1990s with influences drawn from Kreator, Slayer, and Sepultura. The band released their debut album "Infamous Country" in 2001, followed by "Land of Cannibals" in 2003 on Lethal Records and "Superior" in 2008, establishing themselves as a consistent presence in the Brazilian thrash underground. Their current lineup includes guitarists Fernando Cezar and Itazil Junior alongside drummer Josefer Ayres, who also performs with Phrenesy.

Flesh Architect is a technical brutal death metal project from Bogotá, Colombia, featuring guitarist Jorge Eduardo Canal — known from the band Cóndor — alongside vocalist David Viana. The duo debuted in 2024 with the EP "O, Ritualistique" on Sacrilegio Records, a five-track release recorded at 27A Studios in Bogotá that pairs jagged chromatic riffing with spoken word monologues and surrealist compositional touches.

Fleshpyre is a technical death metal band from Brasília, Brazil, with roots going back to 2014 when guitarist Diego Lima and drummer Daniel Moscardini began composing together in the studio. The band released their debut album "Unburying the Horses of War" in early 2018, an eight-track record praised by Brazilian metal press for its technical complexity and melodic sensibility, featuring cover artwork by artist Zakuro Aoyama. The lineup is completed by vocalist Yuri Sabaoth and bassist Josivan Ribeiro.

Flor de Fumo is a psychedelic stoner doom trio from Londrina, Paraná, Brazil, formed by Gabriel Lemes (guitar/vocals), Rafael Camacho (bass), and Tiago Garcia (drums). The band blends South American psychedelia with the ritualistic density of doom metal, delivering a raw, analog sound they describe as smoke-soaked and ritualistic. They released their self-titled debut EP on December 12, 2025, featuring five tracks including "Doom And High," "Smoke And Sex," and "Erva Blues."

Florbela was an antifascist black metal project from Brasília, Brazil, active in 2022 before splitting up. The project contributed the track "Bastardos" to the 2022 Black Metal Rainbows compilation, a collection of queer, trans, and antifascist underground black metal acts released in November of that year. Their inclusion on that internationally distributed compilation placed them within the global wave of politically engaged extreme metal emerging from Brazil in the early 2020s.

Fohatt is an atmospheric doom metal band from Curitiba, Brazil, whose sound combines heavy and acoustic guitars with dark atmospheric keyboards and melancholic variations. The band released the EP Ancient Ritual of the Season in June 2023, followed by their debut full-length Reflections of Emptiness in July 2024, the latter promoted internationally through MS Metal Agency Brasil. They also contributed a track to a Saturnus tribute album, signaling their engagement with the broader international doom metal community.

Foken Rotten Noise is an old school grindcore and death metal band from Santiago, Chile, with members drawn from various corners of the Chilean underground metal scene. The band released "Wastedlands" in 2013 through Thanatology Productions in a limited run of 500 CDs, followed by "The Finest Shit" in 2015, both albums channeling raw, anarchic energy with lyrical themes of anti-politics, anti-greed, and personal freedom.

Folhas de Outono is a Christian progressive metal band from Nova Iguaçu, Rio de Janeiro, Brazil, formed in 2014. The band features guitarists Rafael Cabral and Herbert Silveira alongside vocalist Jefferson Sullivan, bassist Daniel Monteiro, drummer Ton Oliveira, and keyboardist Samuel W. Costa. Their debut album O tempo que me foi dado..., released in October 2014, is a twelve-track record whose lyrical themes draw from Christian scripture and personal faith.