Skip to content
Go to file


Failed to load latest commit information.
Latest commit message
Commit time


An open source re-implementation of Chris Sawyer's Locomotion. A construction and management simulation video game that simulates running a transport company.


Build Status

Windows Linux / Mac Download
master CI Travis CI GitHub release


Feel free to join our Discord server to talk about developing the game, or for help getting it to run.


1 Introduction

OpenLoco is an open-source re-implementation of Chris Sawyer's Locomotion (CSL). CSL is the spiritual successor to Transport Tycoon and OpenLoco aims to improve the game similar to how OpenTTD improved Transport Tycoon and OpenRCT2 improved RollerCoaster Tycoon.

Chris Sawyer's Locomotion was originally written by Chris Sawyer in x86 assembly, building on top of his RollerCoaster Tycoon 2 engine. Much of the code is 1:1 with RollerCoaster Tycoon 2. However, the engine has changed substantially enough that OpenLoco currently does not share its codebase with OpenRCT2.

Recent implementation efforts have focussed on re-implementing the UI, so that the data structures involved may be better understood. Once this is done, it is our hope the game logic will be easier to understand and implement.

2 Downloading the game (pre-built)

OpenLoco requires original files of Chris Sawyer's Locomotion to play. It can be bought at either Steam or

The latest release can be found on GitHub.

3 Building the game

3.1 Building prerequisites

OpenLoco requires original files of Chris Sawyer's Locomotion to play. It can be bought at either Steam or

Regardless of platform, the following libraries/dependencies are required:


Linux / macOS

  • cmake
  • make or ninja
  • 32-bit versions of the libraries mentioned above

3.2 Compiling and running


  1. Check out the repository. This can be done using GitHub Desktop or other tools.
  2. Open a new Developer Command Prompt for VS 2019, then navigate to the repository (e.g. cd C:\GitHub\OpenLoco).
  3. Run msbuild openloco.sln /t:restore;build
  4. Run mklink /D bin\data ..\data or xcopy data bin\data /EIY
  5. Run the game, bin\openloco

Linux / macOS:

The standard CMake build procedure is to install the required libraries, then:

mkdir build
cd build
CXXFLAGS="-m32" cmake ..

Running the game will need the data directory from the root of the source code next to the binary. Assuming you're in $SRC/build,

ln -s ../data
cp -r ../data ./data 

4 Licence

OpenLoco is licensed under the MIT License.

5 More information

You can’t perform that action at this time.