Use an extraction tool like ZArchiver (Android) or 7-Zip (PC).
If your game isn't working, follow this guide to fix it and optimize your PPSSPP emulator for low-size gaming.
Extract the file until you see a .iso or .cso file. These are the only formats the PPSSPP emulator can read directly. 2. Fix "Invalid Memory Access" & Crashes
The most common reason a highly compressed game won't load is that it’s still inside a container file like 7-Zip or RAR .
Searching for "highly compressed PSP games under 200MB" is a popular way to save storage, but it often leads to errors like "Could not load game" or constant crashing. Highly compressed games are typically standard ISO files wrapped in .7z , .rar , or .zip archives, or converted into specialized formats like CSO (Compressed ISO) .
For the smoothest experience on low-end devices, use these 2026-standard settings :