Pageninetynine, often stylized as pg.99, carved a unique niche in the hardcore punk scene with their chaotic approach to screamo, a subgenre they helped define and popularize during the late '90s and early 2000s. Emerging from Sterling, Virginia, the band's embrace of a raw, emotionally charged sound, coupled with a penchant for experimentalism, set them apart from their peers. They uniquely numbered their releases, contributing to a kind of mythos and cohesive narrative across their discography. Works like "Document #5" and "Document #7" are standouts that showcase their dynamic range—from blistering, fast-paced assaults to more introspective, melodic passages.

Throughout their existence, Pageninetynine was known for its sprawling line-up, often incorporating eight or more members, which allowed for a powerful, dense, and tumultuous live presence. This collective approach to music-making, alongside their thematic focus on personal and societal struggles, resonated deeply within the DIY punk community. Despite disbanding in 2003, their influence endures, with periodic reunion shows and a lasting legacy in the screamo and hardcore scenes. Albums like "Document #8" and the posthumous releases such as "Document 12" and "Document 10" continue to draw in new listeners, attesting to the timeless quality of their chaotic yet deeply emotional sound.