Ospetor is a raw and atmospheric black metal project from Loja, Ecuador, formed in 2020 and operating under strict anonymity — no names, no identity, no ego. Their 2020 debut Demo I, recorded at Umbral Xtudio/Dungeon Rec, delivers visceral and primitive black metal rooted in the virulent South American underground tradition. Released through Sutsircitna Productions, the band draws comparisons to acts like Satanic Warmaster for their uncompromising, trance-inducing approach to the genre.

One of the most enduring crossover/thrash acts from the Serra Gaúcha region, Ossos fuse the aggressive tempo of hardcore with heavy thrash riffs in a style forged through decades of relentless live activity. Their 2018 album Caos em Mim was followed by Contos do Necrotério, cementing a reputation as one of southern Brazil's most committed names in the crossover underground.

Formed in Belo Horizonte in 2012 by members steeped in Venom, Bathory, and Hellhammer, Ossuário play raw, uncompromising black/speed metal soaked in occult darkness and stripped-back aggression. Their debut EP Metal Antichrist (2016) established their reputation in the national underground, and the 2025 follow-up Metal Póstumo — released on cassette by Morbid Ways to Die and on CD by Cianeto Discos — continues that tradition with the current trio of Coveiro, Necrolsky, and Splatter.

Osteoporosis Aguda is a death metal band from Cantaura, Anzoategui, Venezuela, formed in June 2014 by Ruth Figueredo and Luis Enrique Gomez. The band has released a debut full-length, "Suenos de eterna oscuridad..." (2016), and continued with split appearances and the EP "Bienvenida oscuridad, PT.1: Palingenesia" (2023).

Othuyeg is a death metal band from Córdoba, Argentina, formed in 2017 by guitarists John Long and Syd Xöxō, vocalist Leonardo, bassist Facha, and drummer George Corpsefucker. After a self-titled demo and the "II" EP (2018), the band released their debut full-length "The Doom Walker" in February 2020, a blackened and dissonant death metal record noted for its gritty production and unconventional vocals. They continued with the "Inanis Imago" EP in November 2024, extending their exploration of technical, dissonant extreme metal.

OUDN — short for Our Ultimate Dying Nightmare — blend melodic modern death metal with groove-driven riffing and a polished production sensibility. Their catalog includes the EP Save Us from Ourselves (2016) and the full-length Time to Decay (2018), which display a sound that favors rhythmic punch and melodic hooks over pure extremity.

Named after the legendary ghost ship whose crew perished under mysterious circumstances, Ourang Medan channel that maritime dread into slow, crushing sludge and doom built around themes of cosmic horror and the occult. Their debut full-length Lords of Eternal Seas (2016), recorded at Estúdio Warsong in Natal, captures a dense, ritualistic heaviness that earned them recognition as one of the northeast's standout underground acts.

Originally a Kreator cover project called Hordes of Aggression, Outlanders reoriented toward original material after changing their name in 2011 and spent years honing a Bay Area-influenced thrash attack. Their debut album From Chaos to Extinction, produced by Thiago Bianchi at Fusão Studios and featuring guest vocals from Chuck Billy of Testament, finally arrived after years of recording and stands as a focused statement of old-school thrash conviction.

Forged in São Paulo in 2015 before relocating to Dresden, Germany, Outlaw play an orthodox, melodic brand of black metal with clear debts to Dissection, Watain, and Necrophobic. Their prolific output — spanning Path to Darkness (2018), The Fire in My Tomb (2020), Death Miasma (2021), Reaching Beyond Assiah (2023), and Opus Mortis (2025) on AOP Records — reflects a band that has steadily sharpened its craft across the Atlantic.