: Tools like Lunar IPS or xdelta UI are used to apply the patch file to your original Japanese ISO.
Distributing the pre-patched ISO is copyright infringement. This article does not provide a direct download link for the game. However, distributing the is protected as a derivative work in most jurisdictions, as it contains no original code or assets from the game. earth defense force 2 psp english patch link
Purchase a used copy of the Japanese EDF 2 UMD (available on eBay for $10–20) or buy the official Vita/PS4 remaster to support the developers. Then, apply the patch to a personal backup ISO for preservation. : Tools like Lunar IPS or xdelta UI