I can very much recommend the two AI The Somnium Files game, assuming you like very quirky games. Because that they are. They’re a very light detective work visual novel with extremely silly humor, quirky characters even by jRPG standards, but also a really cool underlying plot and a few interesting twists in each game.

Note: In the first game in particular, the logic is… not logical, to put it mildly. It makes an odd kind of sense 2-3 scenes in, but the first ones it’s super weird that nothing behaves as you’d expect it to.

Not particularly niche, but the Danganronpa series! It’s amazing to me how consistently good all three of those games are, especially since each one keeps upping the narrative ante.

Steins;Gate and Danganronpa