Even without a full patch, many fans play the Japanese version using a translation guide because the core gameplay is straightforward: "destroy all red dots on the radar". :
You're referring to the PSP game "Earth Defense Force 2" and an English patch! earth defense force 2 psp english patch
: Many mission briefings and minor menus may remain in Japanese because the translation was never finalized by the developers. Even without a full patch, many fans play