This is the source code for Duelyst, a digital collectible card game and turn-based strategy hybrid developed by Counterplay Games and released in 2016.
Work is underway to deploy OpenDuelyst as "Duelyst Classic": a version of the game exactly as it was in v1.96.17, before the servers were shut down. This is being tracked in issue #3.
The staging deployment is up and running at https://staging.duelyst.org. Both single-player and multi-player games are available.
Desktop clients for Windows, Mac, and Linux can be downloaded on the Releases page.
Desktop clients currently use the staging environment. They'll use the production environment once it's available.
We have basic support for playing on mobile web currently. From your phone's browser, head to https://staging.duelyst.org to try it out.
To hide the status/navigation bar in Chrome or Safari, open the game and select "Add to Home Screen". When you open the game from the home screen, the status bar will be hidden.
You can also join the OpenDuelyst developer Discord server here. This Discord server is focused on the development of OpenDuelyst, and has channels for frontend, backend, and infrastructure discussions, but it is open for anyone to join.
If you encounter a bug and would like to report it, first check the
Open Issues to see if the
bug has already been reported. If not, feel free to create a new issue with the
If you would like to request a technical feature or enhancement to the code,
you can create a new issue with the
Since OpenDuelyst is currently focused on recreating the game as it last existed in v1.96.17, please avoid creating feature requests related to balance changes.
The game currently includes English and German localization. If you'd like to
contribute translations for another language, take a look at the
app/localization/locales directory. You can copy the
en folder and start
updating strings for the new language, then submit a Pull Request with your
There are about 4,500 localized strings, so this can also be done a little bit at a time. Once the translations are in, we can help get the language included in the game.
OpenDuelyst is licensed under the Creative Commons Zero v1.0 Universal license. You can see a copy of the license here.
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