To achieve such small sizes, "repacks" often strip out radio stations, multiplayer components, or high-resolution textures, leading to a degraded experience.
The idea behind a "highly compressed" download is to shrink a large game like GTA 4—which typically requires about of space—into a much smaller file, sometimes as low as a few hundred megabytes or a few gigabytes. This is done using advanced archiving tools to remove "bloat" like foreign language audio files or lower-quality cutscenes, or by using extreme algorithms that take a long time to unpack. The Appeal for Low-End PC Users
Many sites offering "ultra-compressed" 500 MB versions are often unreliable or contain malware disguised as installers.
However, "highly compressed" versions come with several warnings:
Compressed versions are frequently prone to crashes, missing DLL errors, or broken missions because files were corrupted or removed during the compression process. The Modern Standard: Complete Edition
