As of the latest updates in 2023, several online archives and databases claim to host comprehensive collections of PSX ROMs. However, the accuracy and completeness of these sets can vary. Some notable repositories include:
Technical aspects and challenges
Since direct linking to ROMs is prohibited here, I will outline the methodology used by the community to source these files legally (assuming you own the original discs or live in a region where backups are legal under Fair Use). psx full rom set hot