Machinaria were a heavy/thrash metal band from Bagé, Rio Grande do Sul, Brazil. Their 2014 debut full-length Sacred Revolutions, Profane Revelations drew comparisons to second-wave American thrash acts such as Sacred Reich and Vio-Lence, and was built around a conceptual examination of the Catholic Inquisition. The album earned the band recognition as a standout name in the new generation of Brazilian thrash.

Makabro is a heavy/thrash/power metal band from Villa Regina, Río Negro, formed in 2014 and active in Argentina's Patagonian underground scene. The band self-released a six-track studio EP in 2022, available on Spotify as "Full EP Estudio 2022", documenting their progressive thrash sound.

Maleficio was a heavy/thrash metal band from San Fernando del Valle de Catamarca, Argentina, with a self-titled demo tape among their documented releases and a confirmed album entry "Go to Hell" listed on the Metal Archives. The band centred their lyrical themes on social denouncement and has since split up.

Maze of Madness play straightforward heavy and thrash metal with a raw, stripped-back energy, releasing their debut album "Mass Hatred" in July 2022 shortly after forming. The eight-track record plants the band firmly in the tradition of classic thrash aggression without straying far from the genre's foundational template.

Founded by bassist Samuka as a vehicle for weaving Egyptian history and mythology into power metal, Medjay released their debut "Sandstorm" in November 2020 through Voice Music, followed by "Cleopatra VII" in 2022, produced at Shokran Studios. Their sound incorporates melodic elements drawn from Arabic musical scales alongside driving double-bass rhythms and soaring clean vocals.

Megadriver is one of the originators of the "game metal" subgenre, translating the soundtracks of classic arcade and console games — particularly the Sega Mega Drive library — into full-throttle heavy and power metal arrangements. Over nine studio albums and more than 150 arranged tracks, the project has appeared at festivals including Video Games Live and MAGFest, building a global following among metal fans with a love for retro gaming.

Memoria Hostil is a heavy/thrash metal band from Pablo Nogués in the northern suburbs of Greater Buenos Aires, formed in 2018 with a lineup of Sergio Soto on vocals, Ivan and Alfredo Sturla on guitars, Leo Sturla on bass, and Pablo Mansilla on drums. The band released their debut album "Memoria 1" in August 2022, a six-track record featuring songs including "Mirando Al Sur" and "Mano Propia".

Mercy Shot blend heavy and groove metal with hard rock influences into a muscular, hook-driven sound. Their 2022 album 'Brace for Impact!' showcases the band's range across ten tracks — from the churning 'Sink and Thrive' to the anthemic 'Massive Heart' — cementing their place in São Paulo's modern heavy rock scene.

Metal Warhead play speed-inflected heavy and thrash metal with a hardcore edge rooted in the Rio Grande do Sul underground. Their 2017 debut album 'Metal Avalanche' — an eleven-track statement of intent — signals a band locked into the classic late-1980s thrash aesthetic of brute riffing and relentless pace.