Methrasheros is a thrash/punk crossover band from Ramos Mejía in the Buenos Aires province, featuring vocalist Pablo Methrashero, guitarists Julio Pursan and Gabi Asko, bassist/vocalist Hernan Wattusi, and drummer Leandro Lapolla. Their eleven-track album Enemigos was released on October 6, 2018, with tracks addressing political and social themes.

Michel Garrido is a Santiago-based musician best known as the longtime lead guitarist of Chilean extreme metal band Necrodead. His solo work blends rock, post-metal, and folk influences, with releases including his debut album Bahual (2009) and the Australis Records-distributed Güiña (2021), the latter recorded across studios in Chile and Argentina during the country's social unrest and the COVID-19 pandemic.

Misiva is a heavy metal band from Luján, Buenos Aires Province, featuring Damian Tus on vocals, Ezequiel Corsi on guitar, Pablo Golia on bass, and Lucio Ascani on drums. Their 2020 self-titled EP, recorded at Chivo Records Studios by producer Luis Salvatierra, contains three original tracks and a cover of V8's classic "Lanzados al Mundo," situating the band squarely in the tradition of Argentine heavy metal.

Mono Histeria is a Curitiba outfit blending progressive, doom, and stoner metal into a dense, riff-driven sound. The band released "Volume 1" in 2022 and has tracks such as "Instinto" and "Primata" available on streaming platforms, pointing toward a sound influenced by the heavier end of the psychedelic and doom rock spectrum.

Montanha began their career rooted in classic heavy metal and hard rock before gradually shifting toward fuzzier, psychedelic stoner rock territory. The band introduced themselves with a self-titled EP in 2013 and later developed their heavier, riff-driven sound across subsequent releases including the full-length Alvorada.

Mortal Whisper is a heavy metal band from Santiago, Chile, formed in 2016 by vocalist/lead guitarist José Tapia alongside rhythm guitarist Cristóbal Moreno, bassist Matías Rodríguez, and drummer Francisco Cerda. Their 2016 self-titled EP, recorded and mixed by Cristian Lion at Lion's Roar Studio in Peñaflor, showcases a driving sound rooted in traditional heavy and speed metal.

Motorbastards are a Motörhead-devoted power trio from Curitiba led by bassist and vocalist Carlão Bastard, whose rumbling low-end and raspy delivery draw unmistakable parallels to Lemmy Kilmister. The band channels classic rock 'n' roll aggression through a speed metal lens, and their debut album of original material, 'Divisão Rock N Roll,' sold its entire limited pressing within a year of release.

MotorManiak is a heavy metal band from Bogotá, Colombia, established in 2021. The band plays classic-leaning heavy metal and has released tracks including "Kill the Devil," "Old Times Rock N Roll," "Heavy Cross," and "Omega Riders" through their Bandcamp page. They remain unsigned and active in the Colombian heavy metal underground.

A shred-focused heavy metal outfit from the port city of Santos, Mr. Green traded in technically demanding guitar work within a classic heavy metal framework. The band operated as an independent act and left behind an instrumental-leaning legacy before splitting up.