Audio Desync – The erotic voice lines and music timings fail to trigger correctly.
Corrupted FMVs – The full-motion video sequences (common in late-90s PS1 ero-games) show pixelation or freeze.
Missing Subchannels – PS1 games often use CD-DA (Red Book audio) and subchannel data for copy protection. A poor ISO rip strips these, breaking Disc 2’s content unlock system.
Disc Swap Issues – Authentic gameplay requires swapping between Disc 1 and Disc 2. A bad ISO cannot handle the swap command in emulators like ePSXe or DuckStation.