Played the Steam version, which is called "The Room 4: Old Sins", and came out this year. This is definitely the best in the series so far (I say this not having played the VR entry). And that's saying something, because the other three are also fantastic. It's structured sort of like 3, except more open. You're always able to return to the overworld and access different areas, and there are a lot of puzzles which require you to swap between them. Pretty bold move on the part of the developers, but they're a talented bunch, so of course it was done expertly and never felt overwhelming. This also has the best story element of the series thus far. There's nothing I didn't love about this, go play it.