Open Rails

open_source

Open Rails is a totally free, open-source train simulator supporting the world's largest range of digital rail content. Build routes, run trains, and join multiplayer sessions.

Research & Education

No-Code

3D Modeling Tools

About

Open Rails is a free, open-source train simulation platform that has been in active development since 2009. It is designed to be compatible with Microsoft Train Simulator (MSTS) content, giving it access to thousands of routes, locomotives, and scenarios created by the global rail enthusiast community. The simulator runs on Windows as a downloadable desktop application and is entirely community-funded and volunteer-developed. Key capabilities include a comprehensive physics engine for realistic train handling, a multi-player mode with standalone server support, an in-simulator F9 menu for detailed car and brake control, and support for modern 3D graphics formats including glTF and PBR materials. Users can build their own routes using dedicated tutorials and tooling, making it a strong platform for content creators and modders. Version 1.6.1 introduced self-installing content, an auto-save option, a standalone multi-player server, improved superelevation modelling, and a more detailed brake control interface. The project also hosts an extensive library of documentation, tutorials, and a vibrant community forum. Open Rails is intended purely for entertainment and educational use. It is ideal for railway hobbyists wanting a high-fidelity free simulation, content creators building routes and rolling stock, and educators looking for an immersive rail environment. The open-source nature of the project means developers can contribute code, models, and documentation to continuously improve the platform.

Key Features

Massive Content Compatibility: Supports the world's largest range of digital rail content, including thousands of routes, locomotives, and rolling stock originally created for Microsoft Train Simulator.
Multi-Player Mode: Includes a standalone multi-player server so users can run trains together on shared routes in real time.
Route & Content Creation Tools: Comes with tutorials and tooling for building custom routes and activities, empowering the community to create and share new rail experiences.
Modern Graphics Support: Supports glTF and PBR (Physically Based Rendering) materials for high-fidelity, modern 3D visuals in routes and rolling stock.
Advanced Physics & Controls: Features a detailed physics engine with realistic superelevation, and a comprehensive F9 menu for fine-grained control of cars and braking systems.

Use Cases

Railway hobbyists running realistic train simulations across hundreds of historical and contemporary routes worldwide.
Content creators building and sharing custom routes, locomotives, and rolling stock for the Open Rails community.
Educators using the simulator to demonstrate railway operations, physics, and geography in an interactive environment.
Multi-player rail enthusiasts hosting or joining shared sessions to coordinate train movements across complex networks.
Developers and modders contributing code, 3D models, or documentation to the open-source project.

Pros

Completely Free and Open Source: Open Rails costs nothing to download or use, and its source code is publicly available, enabling community contributions and transparency.
Enormous Content Library: Compatibility with MSTS content means users have access to thousands of free and commercial routes and locomotives from around the world.
Active Community & Regular Updates: A dedicated volunteer team continuously ships new features, and an active community provides routes, rolling stock, and support.

Cons

Windows-Only Desktop App: Open Rails is only available as a Windows desktop application, limiting access for users on macOS, Linux, or mobile platforms.
Not Suitable for Professional Use: The project explicitly states it is for entertainment purposes only and is not appropriate for professional or safety-critical rail applications.
Steep Learning Curve for Content Creation: Building custom routes or rolling stock requires familiarity with legacy MSTS formats and dedicated modelling tools, which can be challenging for newcomers.

Frequently Asked Questions

Open Rails is a free, open-source train simulator that supports the world's largest range of digital rail content, including routes and rolling stock originally designed for Microsoft Train Simulator.

Yes, Open Rails is completely free to download and use. It is an open-source project developed and maintained by community volunteers.

Yes. Open Rails provides tutorials and tools for building custom routes and activities. There is a dedicated 'Build Your Own Route' tutorial available on the official website.

Yes. Open Rails includes a multi-player mode with a standalone multi-player server, allowing users to run trains together on shared routes in real time.

Open Rails supports modern 3D graphics formats including glTF and PBR (Physically Based Rendering) materials, which were introduced for early adopters and content creators in March 2026.