Louder than Hell is a traditional heavy metal band from São Paulo, Brazil, founded in 2021 by Rock'n Rafa (also of Metaltex) and guitarist Fabio "Grey Wolf" Paulinelli with the stated aim of keeping true heavy metal alive. The band released their debut full-length True Metal till the End in 2021, followed by Possessed by Steel. Their sound draws firmly on classic NWOBHM and US power metal influences.

Lugubra is a heavy metal band from Bahia, Brazil, formed by vocalist Leonardo Leão, guitarist Rafael Syade, and bassist Marcos Cazé following the dissolution of Drearylands, one of northeast Brazil's most prominent metal acts from 1999 to 2022. The band released their debut album Flores e Pedras in January 2024, blending classic heavy metal with doom, death, and progressive rock influences and Portuguese-language lyrics. They headlined the Palco do Rock festival in Salvador, the largest rock and metal event in northeastern Brazil, at their debut album launch.

Lycanthrope is a black/heavy metal band from Melipilla, in Chile's Santiago Metropolitan Region, with occult themes running through their work. They released a rehearsal demo early in their existence and have been documented on the Encyclopaedia Metallum as part of the Chilean underground metal scene.

Lykanthropia is a traditional heavy metal band from São Gonçalo, Rio de Janeiro, Brazil, whose themes center on lycanthropy, werewolves, and medieval battles. The band is listed on Encyclopaedia Metallum with the album "Werwolf" among their releases, operating as an independent act.

Macabro is a speed metal/punk band from São Paulo, Brazil, featuring Ruan Pablo on vocals, Gui Disanti on guitar, Naum Prado on bass, and Uriel Franco on drums. The band channels working-class protest energy alongside themes of Satanism and anarchy, and released the album "Mensageiros do Caos" (Messengers of Chaos) in December 2023.

Machocabrio is a stoner and hard rock band from Chillán, Chile who debuted with their album Altibajos in July 2015. The nine-track record blends stoner grooves, rock and roll energy, and Spanish-language songwriting in a style rooted in the heavy rock tradition.

Mad Dog is a heavy metal and hard rock band from Buenos Aires, Argentina, led by guitarist Martín Knye — a veteran of Argentine metal who previously fronted LZ2 (1986–1989) and recorded the country's first neoclassical metal album, El fuego sagrado (1989), before stints in Kamikaze, Magiar, and KZ4. The band features vocalist Javier "Oso" Muñiz, drummer Adrián Micheli, and bassist Diego Magnacca, and released a three-track EP in 2016 ("Dios Del Asfalto," "Huestes," "Mad Dog") followed by the ten-song debut full-length Hell Raising Breed in April 2020. Knye has cited Black Sabbath, AC/DC, and Black Label Society as primary influences, describing the band's sound as "pure, hard, and brutal rock."

Mad Roulette are a heavy metal band from Rio de Janeiro, Brazil, formed in 2014, composed of Marcio Abud on guitar and vocals, Andre "Cheddar" on bass and vocals, and Marcos Soli on drums. The band released the full-length Turn the Wheel in February 2018 through MS Metal Records, delivering nine tracks of straightforward heavy metal with prominent riffs and forceful drumming.

Malacara is a veteran Buenos Aires heavy metal band with two albums listed on the Metal Archives: "Vuelvo a tu camino" and "Mi rebelión". The band appeared on the 2006 Argentine tribute compilation "El Barón Vuela Sobre Argentina — Tributo a Barón Rojo", contributing a cover alongside bands such as Riff and Lethal.