Highly compressed PS4 games usually refer to "repacks" or modified PKG files where redundant data (like multiple language tracks or high-resolution textures) has been removed or standard compression algorithms have been applied to the installation files. How PS4 Game Compression Works
(Note: This post is for educational discussion regarding data compression and digital archiving. Always support developers by purchasing official software.) ps4 iso games highly compressed top
.pkg or .iso files