Herein you can find the current demo for The Dark Unknown, released July 1, 2019. In the game you will find a forcefield preventing you from exploring beyond the closest three cities (well, one castle, one village, and one city). Dialog is not altered, so people will tell you to go talk to friends in cities you cannot reach- consider that a teaser for the full game!
In the download you will find, after unzipping, a folder called something like (for instance) dark-unknown-win32-x64, and a readme file with useful information.
Unfortunately, while I can get a Mac version to build, I can't get it to zip or upload because reasons that I don't have the time to look into. So my apologies there.