WARNING : I bought chapter 5 on Patreon and the first screen of the game says it's the Pre-Alpha version, and that only 65% of the actual Chapter 5 has been finished.
You guys might want to wait another 6mo before dropping any money.
Viewing post in Radiant Chapter 5 - Now Available on Patreon! comments
The post is very clear that it's a pre-alpha that's a few scenes short of the full chapter (it's in the title and the changelog) and there's a public progress report detailing this as well.
The beta/the rest of the chapter will be here before the end of the month. Hope you enjoyed/enjoy playing through the rest when it's ready!