fivem: The source code for the Cfx.re modification frameworks, such as FiveM and R

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FiveM needs no introduction if you have ever touched GTA V multiplayer outside of Rockstar's own servers. This is the actual source code of the Cfx.re framework that powers FiveM and RedM, the platform behind tens of thousands of custom roleplay and freeroam servers.

What is fivem?
The source code for the Cfx.re modification frameworks, such as FiveM and RedM, as well as FXServer.

This repository contains the code for the Cfx.re projects, among which are the following: FiveM, a dual-purpose (SP/MP) modification framework for the PC version of Grand Theft Auto V as released by Rockstar Games. RedM, a modification framework for the PC version of Red Dead Redemption 2 as released by Rockstar Games. FXServer, the server component for multiplayer services on the Cfx.re projects. On the multiplayer aspect, the GTA/RAGE modifications differ from other similar modifications by utilizing the embedded game networking frameworks, building a modification framework around them, and expanding the game's functionality on an end-to-end level, directly binding to the RAGE Technology Group's base frameworks and Rockstar North's GTA codebase. To play FiveM, simply download the launcher binaries from the website. To develop FiveM, please follow the documentation in docs/ in the repository. FiveM is licensed under a dual license, details of which are in the code/LICENSE file in the repository.

The facts, straight from GitHub

• Repository: citizenfx/fivem
  
• 4,190 stars and 2,683 forks, with 814 open issues
  
• Written mainly in C++
  
• No standard license declared
  
• Started in 2017, last updated 2026-07-14
  

Getting started
Grab it with: git clone https://github.com/citizenfx/fivem.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 fivem free to use?
The repository does not declare a standard license, which legally means all rights reserved. Treat it as reference and study material, and contact the author if you want to reuse the code.

Is the project still maintained?
Yes, the last update was pushed on 2026-07-14, 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 fivem? 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.