Thrash metal band from the Aconcagua valley in Chile's fifth region, drawing on Bay Area influences including Testament and Megadeth. They released two albums in 2019 — Reino de Esclavos and Deseos de Aniquilación — with the latter receiving physical distribution across South America and Asia through the Nocturnal Silence label.

Ojos Negros is a thrash metal band from San Justo, Buenos Aires, active since 1993 and one of the longer-running acts in their local scene. The band released the album Lágrimas de Odio in 1997 and is signed to the Nacido Muerto label. Their lineup includes vocalist Eduardo Tarascio alongside guitarist Claudio Ferrara and drummer Christian Ferrara.

Old Amoon-Há describe themselves as "extreme 80s metal," weaving ancient Egyptian and occult themes through a sound built on the raw energy of classic heavy metal. Their 2015 demo "Demon One," recorded at Biz Studios in Teresina, introduced a project with a distinctly irreverent streak alongside the mysticism.

Old Audrey's Funeral mine the horror-tinged side of heavy metal in the tradition of King Diamond and Alice Cooper, crafting theatrical, doom-laced songs with narrative weight. Their self-titled debut album — eight tracks released independently on Ash Wednesday 2023 and recorded at Estúdio Maçonaria do Áudio — follows the arc of a damned protagonist from youthful sin through guilt and into an ambiguous death.

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.