According to Rockstar Warehouse, GTA 4 PC size ( Complete Edition) = 22GB.
The main story starts with ‘Niko Belic’ and his journey starts in Liberty City after he arrives on a cargo ship. The game also has two DLCs – ‘The Ballad of Gay Tony’ and ‘The Lost and Damned’. They were later joined together as Episodes from Liberty City. GTA 4 The Complete Edition includes the main game and Episodes from Liberty City.
GTA 4 PC Complete Edition Game Size
According to Rockstar Warehouse, the download size of GTA 4 Complete Edition is 22 GB.
You can purchase and download GTA 4 Complete Edition at an affordable price from various online marketplaces like Steam and Rockstar Warehouse.
Rockstar Warehouse: Click here
Steam: Click here
GTA 4 PC original (older) Game Size
The original Setup size/download size of the GTA IV PC is about 14 GB and the size after installation is about 15 GB.