Projeto Pancada is a crossover trio formed by veterans of the Santa Catarina underground, including members of Homem Lixo and Rhestus. Their debut album "Caos Geral" (2021) blends thrash riffs with hardcore aggression and sardonic Portuguese-language lyrics aimed squarely at pandemic-era Brazil.

Projeto Trator is a São Paulo duo grinding out dense, abrasive sludge and doom with dark guitars and hypnotic low-end grooves over a prolific catalog that stretches back to their 2007 debut EP. Albums like "Despacho" (2015) and the EP "Na Órbita do Medo" (2018) cemented their reputation as ambassadors of the Brazilian underground heavy scene, earned through extensive touring across South America and Europe.

Promethean Gate is a one-person black metal project rooted in Luciferian and Draconian occultism, with all instrumentation and vocals handled by Promethean P. Priest. The debut album "Architecture and Concepts of the New God" (2017) set the tone for a catalogue steeped in left-hand path theology, and the project is affiliated with the Ancient Coven collective of São Paulo underground black metal acts.

Prometherion grew from guitarist Vinícius Starteri's earlier project Alkimistal, fusing Swedish melodic death metal, New York hardcore, and Bay Area thrash into a sound the band calls modern death metal. The name is a neology blending Prometheus and Therion, reflecting a lyrical focus on how people endure hardship, and the band has maintained activity through SoundCloud and streaming platforms despite internal lineup turbulence.

Pronoia were a Buenos Aires progressive metal and djent instrumental quartet whose lineup included guitarists Chowy Fernandez and Gabbo Puente, bassist Bruno Tysak Fichera, and drummer Javier Cuello. The band released two albums during their run: Siniestresia in 2008 and Mimesis in December 2018, the latter demonstrating a heavier shift toward djent-inflected sounds before the group eventually split up.

Protothrash is a thrash metal band from Neiva, Huila, Colombia, active since 2012. They released their debut demo 60 Años in 2014 before dropping their first full-length, Gonorreator, in 2018. The band is known for aggressive, politically charged lyrics that blend blunt social commentary with a confrontational thrash style.

Proyecto Alud are a stoner/doom power trio from Mercedes, Buenos Aires province, who blend heavy fuzz-driven riffs with sludge and experimental textures. Since forming in 2021, they have released two albums: Rancho Relaxo in July 2021 and Brama de ciervo rojo in January 2022, both available on Bandcamp and major streaming platforms.

Proyecto Grial are a heavy and power metal band from Córdoba, Argentina, built around vocalist Pablo López and rounded out by guitarist Gastón Visuara, keyboardist Mauricio Ochoa, bassist Nicolás Moyano, and drummer Edgardo Medina. The band debuted with a self-titled EP in May 2018 and released their first full-length album on November 14, 2021, featuring guest vocalists Celeste Sarmiento and Carlos Ortiz, with lyrical themes drawn from medieval history and fantasy.

Psicocancer are a thrash/speed metal crossover band from Santa Fe, Argentina, whose five-person lineup includes vocalist Rama Daneri, guitarists Lauti Daneri and Guillermo Nudel, bassist Leo Bonzzi, and drummer Eric Daneri. The band released their debut album La Reconquista independently in 2017, delivering politically charged thrash influenced by early Anthrax and Agent Steel.