Official versions exist for Xbox 360, PS3, PC, Xbox One, PS4, and Switch. The PSP Era:

However, a persistent search term often circulates on emulation forums and search engines: specifically with file size markers like "171 MB."

project. Real ISO files for the PSP would need to be official releases or professionally developed ports, neither of which exists for this title. What is "171 Top"?

The PSP version of Castle Crashers includes:

Development shifted to the Xbox 360’s Live Arcade, where it became a breakout hit in 2008. Expansion: It eventually reached the PlayStation Network