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.

Psicodeath is a death metal band from Londrina, Paraná, with roots documented on Metal Archives going back to a 1994 cassette demo titled "Devastated World." The band's early activity placed them among the first wave of extreme metal acts to emerge from Paraná's interior, a region less prominent in the Brazilian death metal canon than São Paulo or Rio de Janeiro.

Psiconauta is a sludge and doom duo from Pernambuco, Brazil, consisting of Anderson Moss on vocals and guitars and Ad Luna on drums, active since 2012 and self-described as an "original Brazilian Sludge/Doom entity." The band released the two-track "Hunting Day" EP in December 2018, recorded and mixed at Pólvora Studio, and contributed the 14-minute track "Deep Mantra (Prajnaparamita Mantra)" to the Doomed & Stoned Latinoamerica Vol. I compilation in February 2018.

Psicopatia formed in the satellite city of Planaltina on the outskirts of Brasília, with a lineup including vocalist Morto Apodrecido, guitarist Solfieri, and drummer Doentio. The band released the three-track "Letargia" demo in July 2019 through Balrog Rec, and followed it with the "Náusea" EP in 2022; both releases were compiled alongside rehearsals and bonus tracks on "Último Suspiro" (2024, Auditive Cut Records).

Psicorragia is a death/doom metal band from Lima, Peru, formed in 1994, making them one of the longer-standing extreme metal acts in the country. Their sound blends the crushing tempos of doom with the morbid atmosphere of death metal, exploring themes of death, cult worship, and abstract horror. Key releases include the full-lengths Madremuerte (2016) and Salve Mater Mors (2020), the latter released through Postunder.