In the context of retro gaming and emulation, "highly compressed" usually involves several technical modifications: Asset Stripping
You can also find standard, uncompressed ISOs online. However, given the benefits and negligible downsides, "highly compressed" CHD files are the recommended choice for most players.
Smaller file sizes make it easier to transfer the game across local networks to various emulation devices. Emulation and Performance
Urban Reign Highly Compressed: The Ultimate Brawler for PC and Mobile
