Firefrost was a heavy and power metal band from Mococa, São Paulo, Brazil, formed around 2010 and later split up. Drawing on power metal and folk influences, the band recorded tracks including "Eaters of the Dead," "The Lonely Traveller," and "Call of the Immortals," all collected on a self-titled demo slated for release in early 2012. The band released their music independently and maintained a presence on ReverbNation and Bandcamp during their active years.

FireGun is a groove and thrash metal band from Guarulhos, São Paulo, Brazil, formed in October 2009. Their debut EP What's the Reason?, recorded in February 2013 at Estúdio GR in São Paulo, features four tracks and showcases the band's lineup of vocalist Raimundo Rodriguês, lead guitarist Ricardo Oliveira, rhythm guitarist Ivan Santos, bassist Samuel Martins, and drummer Yuri Alexander. The band was working toward a debut full-length titled Inheritance of a Blind Nation as of 2017.

Fireland is a melodic power metal band from Santiago/Viña del Mar, Chile, formed by guitarist and vocalist Rafael Castillo and drawing inspiration from the classic European power metal tradition of Helloween and Gamma Ray. The band released their debut album "God 'n' Evil" in 2010 and followed it with "The Time Traveler" in November 2015, recorded at Monosound Studios in Santiago.

Fireline is a melodic heavy metal band from Fortaleza, Brazil, active since 2017. The band has released multiple tracks and albums through their Bandcamp page, including the album "Crossing Lines" and singles such as "Don't Look Back" and "Under Fire."

Fiscales Muertos is a grindcore and crust punk band from Punta Alta, Argentina, formed by four members — Atrofius on vocals, Yoni on guitar, Chinok on bass, and Gomez on drums. The band released a self-titled EP available on their Bandcamp page, playing fast and raw noise-driven punk metal.

Fishead is a progressive metal band from São José dos Campos, Brazil, founded in December 2009 by guitarist Danilo Martins and drummer Rodrigo Kusayama as a university project before expanding into a full band. They released their debut album "Green Hope" in 2012, followed by the second album "In My Hell" in 2018, the latter recorded at Acrobata Studio and featuring a fusion of hard rock and progressive metal with aggressive lyrical themes. Vocalist Jezer Ferris, a musician with over 30 years of experience, joined the lineup in 2015.

Fisura Craneal is a brutal death metal band from Buenos Aires whose lineup includes Pavlo, Mario, Fede, and Visiones. They released their debut "La Logia del Mal" in February 2013, and followed it with "Desobedientes Oms" in March 2015 — a live recording captured at the sixth edition of the Slaughter Metal Fest in Pilar in December 2014.

Flagellum is a melodic death metal band from Salta, Argentina, one of the few extreme metal acts from that northwestern city. The band has been active since 2004 and released the demo "Insomnio" in 2015, self-releasing material independently on Bandcamp under the name flagellumdei.

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."