Disclaimer: I have not played all of these games and cannot necessarily vouch for them, this list is only based on the shared theme. That said, Every one that I HAVE played was good.
Additional galleries not available on itch
Offical Electric's NOTHING GALLERY. available on their offical website
The Idyllium (2021), Playable on dreams
(there's honestly a lot of these on dreams. the website is too much of a pain to browse to link them all though)
One ending in the stanley parable
And the stanley parable deluxe
Kite Line's "SOUP-likes" collection
I have a bird in this! (under one of a few old usernames though. I'll have to check to see which)
It's not strictly a gallery, and the hotel is only somewhat a museum, but it still fits the wandering around looking at different art pieces bill that this list is about
Both this and the 2021 demo disc are here more because of the wandering around a space to discover works (by different people) element than the way you experience the games themselves. Spectral mall rules but is just a little too gamified for what I'm really trying to get at with this list
