The game "Chikyū Bōeigun 2" (Earth Defense Force 2) was released in Japan for the PSP, and an English patch was created by fans to make the game more accessible to players outside of Japan.
Older threads frequently point to Nicoblog, though many of these links now redirect to modern archives like CDRomance. Why You Might Not Need a Patch
Disclaimer: This guide is for educational and preservation purposes. Always support official releases when available. The author is not responsible for the misuse of patching tools or copyrighted materials.
Earth Defense Force 2 (originally released on the PS2 in 2005 as Chikyuu Boueigun 2 and later ported to the PSP in 2011) is the direct sequel to the infamous EDF (known as Monster Attack in the US). The PSP version, titled (or Earth Defense Force Portable in some regions), is arguably the definitive version of that generation. It includes:
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