Instead of searching for impossible compression, ensure your PC meets the actual minimum requirements to run the game smoothly: Windows 10 (64-bit).
The progress bar didn’t crawl; it leaped. In seconds, a file named LibertyCity_Lite.exe sat on his desktop.
(e.g., stuttering, crashes) Recommending safe, legitimate sources for the game Finding other games that run well on low-end laptops
If you are having trouble running the game, I can help you with:
Avoid searching for "GTA IV Highly Compressed PC Game Only 13MB 15MB," as these are fraudulent. The only way to properly experience Liberty City is to download the full, legitimate version of the game.
The full game requires approximately 15–16 GB of storage space. Files claiming to offer the full game at 1/1000th of that size are typically: