Ensure you have the .bin or .rom1 files; if the list in PCSX2 is empty, the emulator isn't looking at the right folder.

For those interested in mobile emulation, some newer Android ports claim to simplify this setup process: New PS2 Emulator for Android – No BIOS Needed! PRO WARRIORS YouTube• Aug 3, 2025 Troubleshooting

The BIOS (Basic Input/Output System) performs several critical tasks :

It validates game data to ensure it matches the expected PS2 environment.