Here’s a detailed write-up on — covering what they are, why they’re used, the risks, and how to approach them responsibly. What Are “Highly Compressed Wii Games”? “Highly compressed” Wii games refer to game ROMs (ISOs or WBFS files) that have been reduced significantly in file size — often from 4.7 GB (standard DVD) down to 100 MB–500 MB — using formats like 7z, RAR, or ZIP , sometimes with lossy or unnecessary data removed (e.g., duplicated files, padding, unused languages, or intro videos).