From OpenClonk

There is no official release yet. For now, you can download nightly builds to test the game. OpenClonk will be available on the following platforms:

Windows

Linux

Mac

Nightly builds

You can get the most current builds on the nightly builds page. Nightly builds are automatically created every night and contain a Windows binary. Development snapshots, which also contain the game data, are automatically created once a week. Currently, there are only nightly builds available for Windows.

Build from Source

You can grab the most recent source from the repository and compile it yourself. See our Developers Guide for instructions. For Windows, there are step by step instructions available.