The "ISO" version is a digital backup of that disc. When used with a PlayStation emulator (like DuckStation or ePSXe) or burned to a disc for use on a modded console, it allows users to: Select from thousands of pre-loaded cheat codes.
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View last-stored VRAM images, search the game disc for FMV (movies) or image files, and play CD audio. The "ISO" version is a digital backup of that disc
Set the GameShark ISO as your primary disc image . gameshark 50 psx iso