Open the ISO with UMDGen or ISO Tool and delete the following folders:
Move your compressed .cso or .iso files directly into the folder named ISO located at the root directory of your memory card.
The original "music puzzle game" that rivaled Tetris. Because it uses simple vector graphics and procedurally generated music, the compressed file is tiny. Even the full ISO is only 180MB. This is a no-brainer for any compression collection.
1. Dragon Ball Z: Shin Budokai (Highly Compressed: ~50MB – 70MB) Fighting Original Size: ~300MB
Highly compressed PSP games under 100MB offer an incredible compromise between performance and storage utility. They allow retro gaming enthusiasts to carry an entire library of classic titles on a tiny memory card or low-spec smartphone without breaking a sweat. If you prioritize raw gameplay over cinematic cutscenes and high-fidelity soundtracks, these ultra-compressed files are the perfect gateway to mobile nostalgia.
Here is everything you need to know about highly compressed PSP games under 100MB, how they work, and the best titles you can play right now. How Do Highly Compressed PSP Games Work?