This specific phrase often appears on low-quality rom-hosting sites. It does not refer to an official version or a verified ranking but is frequently used as a keyword to attract search traffic. What are these "PSP ISOs"?
Cons:
To conclude, the is the holy grail of beat 'em up emulation—highly sought after, but does not exist in a playable state. The "171" likely refers to a forgotten homebrew prototype that never progressed past the title screen. The "Top" is SEO spam designed to lure nostalgic gamers. castle crashers psp iso 171 top
The Behemoth (the developer) has never made a PSP port. castle crashers psp iso 171 top