When searching for "highly compressed" PS3 games for emulation, it is important to distinguish between (like .7z or .zip) and format-level compression (like .CHD) supported by the emulator itself. Most PS3 games average between 10GB and 40GB, making compression highly sought after to save disk space. 1. Supported Compression Formats
If you find a PS3 game labeled as a "Repack" that is, say, 8GB instead of 20GB, this is often legitimate. How? ps3 emulator games highly compressed
Setup.exe (Real PS3 games are .iso, .pkg, or folder structures).