seems like Sony is starting to curb game piracy thru the game soft itself.
from
Evangelion: First Anti Custom Firmware game., PSP Hacks - PSP Slim Hacks
PSPGen have posted that a new Japanese game, called Evangelion: Jo scans your RAM and detects if you have any type of custom firmware or not. If it detects you have custom firmware. The game will freeze displaying the screen above with some lovely classical musicplayed in the background. It also doesn’t seem that you could bypass this check, since its scanning the RAM….
So Sony have taken things a step further with Anti Custom Firmware games.