The word in the title is the key to the story. It implies this is not an official commercial release found on a store shelf. Instead, it is a homebrew application .
: Players select a female idol and compete in five rounds of Rock-Paper-Scissors. All Star Yakyuken Battle Psp Go Custom
The (the slider version of the PSP without a UMD drive) is specified because of its form factor and storage. The word in the title is the key to the story
All Star Yakyuken Battle is a Japan-exclusive rock-paper-scissors (janken) style party game featuring characters from various anime/manga. It was released as a UMD and a PSN download. : Players select a female idol and compete
To get running on a PSP Go , you'll need to bypass the standard official firmware (OFW) using custom firmware (CFW) like PRO-C or 6.20 LME . Since the PSP Go lacks a UMD drive, custom firmware is essential for loading digital backups (ISOs) of this Japanese-exclusive title. Quick Setup Guide for PSP Go Custom Firmware
Because of the Go’s clock speed (333Mhz is unlocked via CFW):