Luckily it’s DRM-free. Back up your installers. I wanted to call attention to this, because in a very unusual move, it’s being removed even for people who own a copy, whereas usually stores will only remove a game from sale and still host the files for existing owners to download.
I sent email to oxenfree@nightschoolstudio.com and told them in no uncertain words that what they are doing is illegal, and asked how they are going to fix the situation.
If I can find time to, I’ll see about contacting the local consumer protection organisation.