Num is a groove metal band from Buenos Aires, Argentina, whose sound blends thrash, djent, and alternative metal influences into a dense, rhythmically focused attack. The band released three albums in rapid succession — NUM (2014), Desarreglos (2015), and Lo Que Sangra (2017) — building a reputation in the Argentine underground metal scene.

Nunca Mas is an Argentine heavy metal band formed in 2000, whose music draws on left-wing political themes, social history, and collective memory — a stance reflected in their name, meaning "Never Again" in Spanish. The band earned early recognition in the local scene with a contribution to the 2002 Hermética tribute compilation released by Dejesú Records.

Não Inação is a crossover thrash trio from Mauá whose debut EP Saúde Mental Deteriorada packs five tracks of politically charged aggression into under eight minutes, drawing equally from São Paulo hardcore punk and classic thrash. Tracks like "Falta de Ar" and "Desespero" hit themes of mental deterioration and social pressure with the blunt economy the genre demands.

Némesis is a thrash metal band from Concepción, Chile, formed in 1998 with influences drawn from old-school thrash and death metal acts including Slayer, Kreator, and Malevolent Creation. The band released a self-titled album in January 2016, marking their continued presence in the Chilean thrash underground after more than two decades of activity.

Nîn Morn is a doom/death metal band from Santa Cruz de la Sierra, Bolivia, formed in 2011 and signed to No Wasted Records. The band progressed from early EPs — Funeral (2012) and The Black Box (2015) — to their debut full-length Victus Paradisum in 2021, building a sound anchored in themes of death, despair, misanthropy, and nature. Their 2019 EP Valle de la muerte and 2023 single Lament continue to refine their dense, grief-laden approach to the genre.

Nöldr is the solo black metal and dungeon synth project of Lord Deathlaff, whose 2021 debut Misanthropic Forest established the project's tone: raw tremolo-driven riffs shadowed by a melodic melancholy, closing into dark ambient territory. Subsequent releases including the Dynasty ov the Darkened Evocations EP and Profane Eternity deepen a cosmology drawn from Tolkien, Norse myth, and the bleak aesthetics of second-wave black metal.

Nādha released their self-titled debut in 2022, a ten-track record that weaves progressive and death metal into a bilingual framework of philosophical and introspective themes, drawing on Sanskrit imagery in the band's name. The Rio quintet — featuring guitarists Juan Carlos and Rafael Rassan alongside drummer Jean Falcão — balances technical density with melody, moving between Portuguese and English across tracks like "Anāhata" and "Ephemeral Being".