# OpenTTD

> OpenTTD is a free, open-source transport simulation game based on Transport Tycoon Deluxe for Windows, macOS and Linux, playable with free graphics or the original's files.

Web page: https://emulationking.com/microsoft/windows/games/transporttycoondeluxe/ports/openttd/
Page updated: 2026-10-26

- Developer: OpenTTD Team
- Port type: Reimplementation (The game was rebuilt in new code that plays like the original and loads its data from your own copy.)
- Game: [Transport Tycoon Deluxe](https://emulationking.com/microsoft/windows/games/transporttycoondeluxe/index.md)
- AI use: No AI. The project says: “Using an AI tool to generate entire lines of code is unacceptable.”
- Source code: https://github.com/OpenTTD/OpenTTD
- Runs on: Windows, Linux, macOS

What you need: Nothing: OpenTTD comes with OpenGFX, OpenSFX and OpenMSX, free sets of graphics, sound and music. To play with the original look, copy the data files of Transport Tycoon Deluxe (Windows or DOS version) into OpenTTD's `baseset` folder.

OpenTTD was first released in 2004 as a reverse-engineered rewrite of Transport Tycoon Deluxe, Chris Sawyer's 1995 game about building a transport company with trains, road vehicles, ships and aircraft. It has since grown into a game of its own that keeps the original's feel while extending it in almost every direction.

It adds online multiplayer, much larger maps, signals and pathfinding far beyond the original, timetables, cargo distribution and a huge library of add-ons, from new vehicles and industries to AI opponents and game scripts, downloaded from inside the game.

Because it ships with free replacement graphics, sound and music, OpenTTD needs no original files at all, but it still reads the data of Transport Tycoon Deluxe for players who want the 1995 look.

## How to set it up

1. Download the installer or zip for Windows, the macOS disk image or the Linux archive.
2. Install or unzip it and start OpenTTD. The free graphics and sound sets are included, so the game starts straight away.
3. To use the original graphics, copy the files of your Transport Tycoon Deluxe install (such as `TRG1R.GRF` and `TRGIR.GRF`, or `TRG1.GRF` for DOS) into the `baseset` folder and pick them under Game Options.

## Latest builds

Download these from the web page: https://emulationking.com/microsoft/windows/games/transporttycoondeluxe/ports/openttd/#download

- for Windows (ARM64): 15.3 (2026-10-26)
- Installer for Windows (x64): 15.3 (2026-10-26)
- for Windows (x64): 15.3 (2026-10-26)
- for Linux (x64): 15.3 (2026-10-26)
- for macOS: 15.3 (2026-10-26)