Your personal "hidden gem"?

As the title says, what is one game you consider to be a "hidden gem"?

"Hidden gem" basically means a game (any generation/console) thatyou thinkis good and not too many people may know about.

Mine is Alundra for the PS1.
Some know about it, but it's still unknown enough to make some people scratch their heads.

Mine has to be Legend of Legaia, it was such a ridiculously cool game to me growing up. I originally played it on a Playstation demo disc. I probably played that 15-20 times before being able to get the actual game. To this day it's one of the most unique turn-based RPGs I've ever played.

I think I've heard of Alundra before when I was looking for PS1 RPGs to play, haven't gotten around to playing it but I will do now!

Mystical Ninja for the N64. I've literally never seen anybody who knows of this game.

I enjoy playing Nidhogg and Lethal League with my friends. Also, Depth is really fun as well but spooky af.