This may have been the first RPGMaker horror game I ever played -- I can't remember if it was Ib or Corpse Party I experienced first -- and it's still one of my favourites.

I haven't played it in a good few years, and I plan to play the remake once I get around to it, so this is based entirely on my memory of the original. The atmosphere was amazing -- I'm not sure why 'horror set in an art gallery' isn't more commonly utilised, because Ib shows that it can be perfectly terrifying. The use of art to drive along the horror aspects as well as the emotional beats was great, and certain words in books being illegible if you're playing as Ib because she's too young to understand them vs. being able to read them if you go back as Garry (which can lead to some twists and reveals) was a clever detail.

Great characters, and Garry is still a favourite for me years later. Now that I think about it, I turned out uncomfortably like this guy. Maybe this game influenced my brain more than I suspect.