Firmament is an atmospheric/ambient black metal project from Erfurt, Germany, formed in 2021. The project creates vast, immersive black metal soundscapes from the Thuringian capital.

Firmamentum is an ambient/raw black metal project from Italy, active since 2014. Their debut Infinity Of The Forest was originally recorded on a small tape recorder — the band insists it is best heard in cassette format — blending raw black metal with dark ambient in a deliberately lo-fi, analog-first aesthetic.

Firn is a pagan black metal project from Thuringia, Germany, formed in 2022. The project — named for compacted snow that becomes glacier ice — channels cold, nature-inspired pagan black metal.

First Aid is a power/thrash metal band from Berlin, Germany. The band combines the melodic hooks of power metal with the aggressive edge of thrash from the German capital.

First Blood is a thrash metal band from Bexleyheath, England, formed in 2017. The band delivers fast, aggressive thrash metal from the southeast London borough.

First Born is a heavy metal band from Hereford, England, formed in 2020. The band delivers classic heavy metal from the Welsh border city.

First Dawn is a melodic black metal project from Finland, formed in 2014. The project blends melody with the cold fury of black metal.

First Degree Murder is a death metal band from Herford, Germany, formed in 2023. The band delivers unrelenting death metal from the East Westphalian town.

First Fight Down is a metalcore band from Kaatsheuvel in the Netherlands, active since 1999 — making them one of the longest-running metalcore acts in the Dutch scene. Their quarter-century of activity spans the full arc of metalcore's evolution from underground origins to mainstream recognition.