If you are playing on an actual PSP console, you need Custom Firmware (CFW).
When downloading "highly compressed" files (especially those claiming to be under 100MB), be cautious. Extreme compression can sometimes lead to or low-quality audio . Always check if the file is "RIP" (parts removed) or "Full" (nothing removed, just compressed). To help you get the best experience, let me know: batman psp highly compressed
🛠️ Modified files may crash or experience glitches during specific levels. 🛠️ Alternatives & Emulation If you are playing on an actual PSP