# OpenLoco

> OpenLoco is an open-source re-implementation of Chris Sawyer's Locomotion for Windows, macOS and Linux, fully rewritten in C++ with fixes and improvements.

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

- Developer: OpenLoco 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: [Chris Sawyer's Locomotion](https://emulationking.com/microsoft/windows/games/locomotion/index.md)
- AI use: Not stated
- Source code: https://github.com/OpenLoco/OpenLoco
- Runs on: Windows, Linux, macOS

What you need: The files of Chris Sawyer's Locomotion, from a CD or the Steam or GOG release.

OpenLoco is an open-source re-implementation of Chris Sawyer's Locomotion, the 2004 transport tycoon game that followed Transport Tycoon and was built on the RollerCoaster Tycoon 2 engine. Like OpenTTD and OpenRCT2 before it, it aims to improve the game while keeping how it plays.

The original was written in x86 assembly. The OpenLoco team replaced it piece by piece and finished rewriting the whole game in C++ in December 2025. Their next goals are solid multiplayer and higher map and vehicle limits.

It needs the original game's files and plays its scenarios and saves.

## How to set it up

1. Download the portable zip for Windows, the macOS zip or the Linux AppImage, and unpack it.
2. Start OpenLoco and point it at your Locomotion install folder when it asks.
3. The macOS builds are not signed, so Gatekeeper may block them the first time: right-click the app and choose Open.

## Latest builds

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

- for Windows (32-bit, portable): 26.09 (2026-09-18)
- for Windows (x64, portable): 26.09 (2026-09-18)
- for Linux (AppImage): 26.09 (2026-09-18)
- for macOS: 26.09 (2026-09-18)