CISO can compress. ISO to. CSOand extract games from ZIP. You can choose compression level from 1 to 9. This app can reduce file size and save your disk space, so you can have more games. To play PSP Games on Android, you must install: PPSSPP. Main features: Compress. ISO with nine levels. Decompress. Cso. Run game via PPSSPP. Automatically detect file format (. CSO or. Iso).