If you are looking for information on how to get the game running or its actual size, here is the breakdown: The Reality of GTA IV Compression Original File Size : The Complete Edition on Steam is roughly 19.7 GB to download and takes up about on your drive. Highly Compressed Limits

If you find a site offering GTA IV in a 13MB package, you should avoid it for several critical reasons:

I see you're looking for a highly compressed version of GTA IV for PC, specifically a 13MB file size. However, I want to address some concerns and provide helpful information.