Applying the patch requires a Japanese ISO of the game (ID: NPJH50332). Installation - PSP2i Wiki

An untranslated copy of the PSP2i ISO. English Patch - The english patch, contains a . xdelta file and a . pdf for installation by... Phantasy Star Portable 2 Infinity Wiki Phantasy Star Portable 2 Infinity English Patch Installation Guide v2 xdelta UI - a program used to apply the patch * If you're reading this, you must have unpacked the . 7z file already. Have the inc... Scribd Phantasy Star Portable 2 Infinity v2 English Patch Installation ... xdelta UI - a program used to apply the patch * If you're reading this, you must have unpacked the . 7z file already. Have the inc... Scribd Modifications - PSP2i Wiki Jun 3, 2025 —

It is important to note that this is an official localization by SEGA. It is a fan-made patch. To play it, you need specific hardware or software:

Menus and interface elements were redesigned to fit longer English strings.