Open Rails

Download > Versions


Three Versions of Open Rails

Three versions of Open Rails are readily available to users, as shown below:

For first-time users, we recommend the Stable Version which comes with an installer.


Whichever version you choose, Open Rails has a mechanism to notify you of new versions and to update Open Rails for you. You will find the settings for this mechanism in Menu > Options > Update

Open Rails will check for updates at most once a day. If an update is found, then you can install the update just by clicking on the link in the top, right corner:

Testing Version

If you follow the Open Rails project on the forums, then you will hear about bug-fixes and new features. These are included in the Unstable Version for developers and testers to try out. Once they have been checked and approved, they are published (on Friday) as the latest Testing Version. Any user can easily update to the current weekly Testing Version and benefit from these improvements.

For reference all the Testing Versions (executable and source) can be found in our archive.

Recent Code Changes

  • T1.5.1-905-gaf8fb30c5 Merge pull request #917 from SteelFill/lights_enhancements
    Lighting Configuration Enhancements
    • 644844af Fix small initialization error
    • 41f2b692 Undo use of IEnumerator syntax as this seems to be less efficient than traditional loops
    • 3bbf66e5 Prevent vehicles with no lights from creating a LightViewer
    • a948dbe1 Added ability to attach lights to shape sub-objects, some refactoring, and entry in news.rst
    • fde18cf4 First pass for new lights features
  • T1.5.1-899-gf9d64a4dc Merge pull request #907 from Csantucci/fix-disappearing-dynamic-tracks
    Bug fix for Dynamic tracks disappear after long tunnel
    • 9b0b04fa Fix porting from ORNYMG
    • 54d11198 Bug fix for Dynamic tracks disappear after long tunnel
  • T1.5.1-896-g2caa821ce Merge pull request #897 from twpol/feature/telemetry
    feat: Improved system information collection
    • 42f1dd9d fix: Use DXGI to get adapter memory as WMI is unreliable
    • 0a9d9391 fix: Allow for malfunctioning WMI in system data
    • 64a29c8a feat: Improved system information collection
      A number of less useful information (e.g. disk space) have been removed, and more useful information (e.g. Direct3D feature levels) added.
  • T1.5.1-892-g9ad34eb10 Merge pull request #915 from peternewell/curve_friction#2
    Correct calculation error with curve friction
    • d1fc31f4 Add LOG file indication that default values have been selected.
    • 6d911d7c Correct calculation error with curve friction
  • T1.5.1-889-ge5d0fbbd4 Merge pull request #914 from peternewell/Steam-Effects#1
    Adjustments to Duplex steam
    • 2ffadd62 adjust hammer force display
    • e06fbf16 Add manual documentation
    • 30fd5c4c Update hammer blow.
    • 476d67b9 add hammer force calculations
    • 8e505702 correct initialisation issue
    • 26123859 correct bug introduced
    • f29be1e0 update sander
    • ab5ea99b manual update
    • 29245e16 Adjustments to steam sander
    • 3d52d1d2 Make wheel axle ang visible in all engines in the HuD
    • 05d16cee adjustment to track sanding calculations
    • 1dea28cb Adjustments to Train Operations window
    • 69a4cccf Correct drive wheel revolutions
    • e2366542 Adjustments to sander system
    • 9ee1da39 Update train operations window
    • ac762a54 Add steam sander effects
    • adc9bd72 Adjust wheel slip notification
    • 5e3fe316 Adjust steam exhaust effects

See more code changes

The current Testing Version can also be downloaded as a Zip archive:


01 March 2024, 92MB

The documents included in the Testing Versions downloads can be found on-line at:

Note: Multiple versions of Open Rails will not interfere if they are saved to different folders.

Unstable Version

To support development, the latest unstable version is also available, which is updated whenever a developer publishes a change. The unstable versions are more likely to contain serious bugs and are only recommended for users wishing to help with Open Rails development.

The Manual for the Unstable version is not included in the download, but is available on-line.

For reference all the Unstable Versions (executable and source) can be found in our Unstable archive.


Improvements to Open Rails are drawn from several public sources as shown here:

We try to make sure that these changes all work and fit together by reviews as marked in orange in the diagram.