If you find the .iso version, you can easily convert it to .cso yourself using tools like PSP ISO Compressor or UMDGen to save roughly 20-40% of the file size.
Looking for the compressed .cso version of the PSP Mini title Guerrilla War . This is the SNK arcade port released under the "Minis" banner for PlayStation Portable and PlayStation 3. Title: Guerrilla War (SNK Arcade Classics) Platform: PSP / PS3 (Minis) Format: .CSO (Compressed ISO) Original Release Date: 1987 (Arcade) / 2011 (Minis Port) Region: [Specify Region, e.g., USA/NTSC or EUR/PAL] Download Guerrilla War (minis) cso
Request / Archive: Guerrilla War (SNK) – PSP Minis [CSO Format] If you find the
Ensure your custom firmware (CFW) is up to date, as some Minis require specific NPJH or NPUZ folder structures depending on how they were originally packaged. Title: Guerrilla War (SNK Arcade Classics) Platform: PSP
Reliable archival sites often group PSP Minis into a single collection rather than individual files. Search for "PSP Minis Collection" on reputable ROM archives.