Experimental Build

How to Join (Steam only)
In your Steam library:

Right Click on Astroneer > Properties > Betas tab > From the drop down select, "experimental - Latest untested builds" > Hit 'Close'

Steam should automatically grab that build. Once it's done, run the game. You're now running the Experimental build of Astroneer. When you want to go back to the MAIN build, repeat these steps but choose "NONE" from the drop down list in 'Betas' tab.
 * NOTE: All save game made in the experimental build will not be compatible in the main build, and vice-versa