Groove/death metal band from Santiago, Chile, formed in 2015. Their debut release, the five-track EP Disruption (August 2015), blends the rhythmic chug and midtempo heaviness of groove metal with death metal aggression.

Obscured by Shadows is a Buenos Aires project built around brothers Martín A. Fuster and Leonardo M. Fuster, alongside keyboardist Rodrigo Thav Sanchez, who together span symphonic death/power metal and experimental rock across their releases. The band released Nuh Atmospheric Era in 2016 and followed it with Origin of Future Concepts in 2018, both available on their Bandcamp page.

Death/thrash metal five-piece from Santiago, Chile, formed in 2025. They released their self-titled debut on January 10, 2025, a three-track record featuring songs including "Dying Hounds" and "Terror."

Obscurity Tears trace their roots back to 1994, when the band began under the name Smashed Face drawing deep from Paradise Lost, Cathedral, and My Dying Bride before refining the sound and adopting their current name. By 1999 they had expanded with the addition of vocalist Nitelma Lima and violinist Jefferson Barreto, whose contributions gave the band the dense, mournful atmosphere that defined their 2000 debut "Songs for a Black Winter"; Jefferson Barreto remains central to the project, resurfacing decades later on the 2023 record "Doom4Ever".

A São Paulo trio grinding death, thrash, and doom into a single bleak weight, Obsessor channel themes of societal decay and depression through a rawly recorded, underground aesthetic. Their self-released demo material captures a band firmly rooted in the South American extreme metal tradition with no concession to polish.

One of the early extreme metal acts out of São José dos Campos, Obsessos played caustic death/thrash driven by Satanic and occult imagery in the spirit of the mid-1980s South American underground. Their 1987 demo 666: The Ultimate — featuring tracks like "Scream of Priests" and "Satan's Procreation" — stands as a raw document of the era before the band dissolved in 1988.

Curitiba's Obsidian Void combine orchestral grandeur with black metal hostility, drawing on the symphonic tradition without smoothing out its abrasive edges. Tracks like "At the Bottom of the Abyss" and "Center of Nothing" signal a project preoccupied with darkness and cosmic void as thematic territory.

Founded in 1989 in Fortaleza by brothers Amaudson and Jolson Ximenes, Obskure are among the longest-running extreme metal bands in the Brazilian northeast, fusing melodic death metal with doom and black metal undertones across a discography stretching from the demo Uterus and Grave (1990) to the full-length Dense Shades of Mankind (2012). Their 2001 EP The Emptiness Spectable featured a guest vocal appearance by Alex Camargo of Krisiun, and the band's 2017 release Sacrifice of the Wicked showed no signs of the grim relentlessness fading after nearly three decades.

Obsoleto is a Buenos Aires melodic death/metalcore band founded in 2017 by guitarists Ezequiel Zuazo and Patricio Puyo, later joined by vocalist Roberto Wolk and drummer Sebastian Lecoque. The band's English-language lyrics draw on science fiction source material — Terminator, Blade Runner, and Westworld among them — exploring themes of artificial intelligence rebellion against humanity. Their debut album Awakening was released in February 2022.