The standard ISO file is converted into a Compressed ISO (CSO). PPSSPP reads this directly.

A real PSP game file will never extract into an executable setup wizard or an Android app. If a download link forces you to install an application to get the game, delete it immediately.

The Warriors is a graphically demanding PSP title. If you experience audio stuttering, lag, or low frame rates, adjust your PPSSPP settings to match the configuration below: Graphics Settings

Short troubleshooting cheatsheet