An MMO based on Horizon Forbidden West and its predecessor, Horizon Zero Dawn, is potentially in development, and this prospective spin-off could allow one feature, with which the single-player games struggle, to shine. Though reports in early 2025 alleged that NCSoft had stopped working on its online spin-off of the Guerrilla Games series, there is still hope for Horizon's MMO under the codename "Project Skyline." If it is true that the game is still being developed, then the Horizon MMO still has a chance to succeed in one particular area where Zero Dawn and its sequel seemed to fall short.