A solo raw black metal project launched in 2022 by Billy Grind, Old Bats operates deep in the primitive end of the genre, self-releasing the EP "Primitivo" and a self-titled single through Bandcamp with minimal production and maximum menace. The project is a one-person affair in the truest underground tradition.

Old Coffin Spirit deal in the slowest and most suffocating end of funeral doom, lacing it with black metal atmospherics to produce a sound steeped in death, darkness, and drifting spirits. Their 2015 debut, Out of the Dark...Into the Light, lays out seven tracks of cavernous, crawling misery, with song titles like "Ancient Soul" and "Nocturnal Fog" telegraphing exactly the mood they're after.

Thrash metal band from Santiago, Chile, rooted in the Bay Area sound of the late 1980s. They released the Advance LP in January 2019 on Misfortune Records as a limited cassette edition of 100 copies.

Old Grave channel the primitive savagery of Hellhammer, Celtic Frost, and Venom into a blackened death metal attack built around the core trio of Jonas Hoerlle (drums), Jailson Santos (guitar), and Marcelo Scheeren (vocals). The band cut their teeth performing regionally before entering the studio to record their 2020 demo, a raw document of their devotion to first-wave extremity.

Old Quasar draw from the fuzz-heavy well of Black Sabbath and Kyuss while working in a more reflective, introspective thread courtesy of vocalist and lyricist Daniel Vitório, whose lyrics take cues from Henry Thoreau's writing. Their self-titled debut, a five-track EP recorded in a single weekend at Casa 39 studio, establishes a dense, doom-tinged stoner sound.

Old Stove cook up a thick, fuzz-coated brand of stoner rock powered by the guitar and vocals of Gabriel Freitas, with Lucas Braga on bass and Murilo Costa on drums locking in a heavy, desert-scorched groove. Their 2015 debut album #1 opened with the slow-burning "Place Pigalle" and showcased a band clearly schooled in the low-slung psychedelia of the genre's American forebears.

Old Throne is the one-man black metal vehicle of Fernando Count Old, a project he has driven since 2007 through a series of demos, EPs, and full-lengths steeped in anti-religious contempt and raw, uncompromising misanthropy. The 2013 album O Novo Mundo Pagão stands as a centrepiece of his catalogue, released through both the Japanese label Weird Truth Productions and domestic outlets.

Older Jack are a heavy metal and hard rock band from the German-heritage city of Pomerode in Santa Catarina, whose album Metal Uber Alles — a tongue-in-cheek nod to the genre's grand traditions — arrived as a limited CDr release. Their sound sits squarely in the classic heavy metal tradition, drawing on the melodic riff-driven energy that defined the genre in its formative decades.

Oldlands is a one-man black metal project helmed entirely by Vox Morbidus, drawing deeply on the raw, stripped-down aesthetics of 1980s and 1990s European black metal. After releasing the full-length Source of Eternal Darkness in 2019, the project matured with Oldmaster in 2023, a record structured like a vinyl side A/B split that pairs guttural and high-pitched vocals with keyboards and acoustic passages.