5 hours ago
![[Image: gtaiv.eflc.fusionfix.png]](https://gta.how/images/github/gtaiv.eflc.fusionfix.png)
GTA IV on a modern PC is rough without help, and FusionFix is the help. It fixes a long list of issues in GTA IV and its episodes: frame pacing, graphics regressions, controls and more. Nearly three thousand stars say the community agrees it is essential.
What is GTAIV.EFLC.FusionFix?
This project aims to fix or address some issues in Grand Theft Auto IV: The Complete Edition
This projects aims to fix some issues in Grand Theft Auto IV: The Complete Edition, as well as add various new features for modern systems. Also available for Max Payne 3 and other games. Install Grand Theft Auto IV: The Complete Edition from your library, then: Download GTAIV.EFLC.FusionFix.zip and unpack its contents to the game's root directory, where the exe is located. Or alternatively download GTAIV.EFLC.FusionFixWebInstaller.exe or GTAIV.EFLC.FusionFixOfflineInstaller.exe, open it, select the game's directory and wait for it to finish. Note: If you get an error while installing, this is likely due to the installer not having write access. Go into the properties of the games directory and change your system's users to have write permission and hit apply, now installation should work. Non-Windows users (Proton/Wine) need to perform a DLL override. You need to tell Wine explicitly that the dinput8.dll file is to be used. There's more than one way to achieve it. Note that Proton Experimental already loads it by default, so you may skip this step. Method 1: WINEDLLOVERRIDES variable lets you temporarily specify DLL overrides.
The facts, straight from GitHub
- Repository: ThirteenAG/GTAIV.EFLC.FusionFix
- 2,966 stars and 107 forks, with 55 open issues
- Written mainly in C++
- Licensed under GPL-3.0
- Started in 2019, last updated 2026-07-13
Getting started
Grab it with: git clone https://github.com/ThirteenAG/GTAIV.EFLC.FusionFix.git
You will need a C++ toolchain (Visual Studio on Windows or gcc/clang elsewhere) plus CMake if the project uses it. Check the README for exact build steps.
Frequently asked questions
Is GTAIV.EFLC.FusionFix free to use?
It is released under the GPL-3.0 license, so it is free to use. Read the license text for the exact terms before you ship anything based on it.
Is the project still maintained?
Yes, the last update was pushed on 2026-07-13, so the project is alive and moving.
What do I need to know before diving in?
The project is written mainly in C++, so some familiarity there helps a lot. Start with the README, then browse the open issues to see what the rough edges are. That is usually the fastest way to understand the real state of any repository.
Where do I get help if I am stuck?
Open an issue on the GitHub issue tracker, check existing discussions, and of course post right here in this topic. Someone in the GTA community has probably hit the same wall before you.
Over to you
Have you tried GTAIV.EFLC.FusionFix? Are you running it, forking it, or did you rage quit halfway through the setup? Reply below with your experience, your questions or your own favorite alternative. If there is enough interest we can put together a community guide for it.