: Standing for Compressed ISO , this is a compressed image format that saves space but can sometimes cause slower loading times or minor stuttering on original PSP hardware.
Because this file is a , it was specifically designed for users running Custom Firmware (CFW) on their PSPs who were trying to maximize their limited storage space. : Standing for Compressed ISO , this is
Suggests the game was optimized to fit on a standard 1 GB Memory Stick Pro Duo. : Standing for Compressed ISO