For me right now, Shadows of Doubt. It is an early access game and it’s got a fair bit of jank, but it’s crazy how unique it is. It had a week or so of popularity and then it fell off. The devs just released an update for it too!

If you like the immersive sim genre, might I also recommend Cruelty Squad and Gloomwood. Those two have very unique aesthetics and really cool mechanics.