: CSO is a compressed format for ISO files, which are essentially disk images. For PSP games, CSO files are used to reduce the file size of game data, making it easier to distribute and store on memory sticks or download.
Ever wonder how Media Molecule and Sony Cambridge managed to squeeze an entire universe into a file? TIMETHIEF’s compressed version of LittleBigPlanet -PSP- Little Big Planet-CSO----TIMETHIEF-
is a standalone adventure, not a direct port of the PS3 game. It features an entirely original story and levels! The Format (.CSO): This stands for : CSO is a compressed format for ISO