GTAIV.exe is the main file used to launch the game. You may also see PlayGTAIV.exe in older versions.
For a visual walkthrough on how to properly set up the directory and install essential fixes like Fusion Fix:
Unzip the contents of Grand Theft Auto IV.zip into a new folder on your drive (e.g., C:\Games\GTA IV ). If you have the "Complete Edition," an update
If you have the "Complete Edition," an update or DLC folder will house The Lost and Damned and The Ballad of Gay Tony . Installation Steps
If the game fails to launch, you may need a commandline.txt file in the root directory with parameters like -availablevidmem to bypass memory restrictions on modern hardware. If your zip contains an ASI loader like dinput8
A standard installation (approximately 22 GB on disk) should include these primary components:
The pc and common folders contain the bulk of the game’s assets, including models and textures. If you have the "Complete Edition
If your zip contains an ASI loader like dinput8.dll or xlive.dll , these must be in the same folder as the .exe to enable scripts and save game functionality.