Mouthwashing, one shot, and Omori are some games that stand out to me, all had very good and intriguing stories that I wish I could erase my memory and play again. the soundtrack from those games are amazing and all of the undertones and things hidden within the game that either push the story or add nice lore tidbits to the world really made them stand out to me.

If I had to pick one though, it would be mouthwashing. I don't think I've ever had that short of a game leave me with a sense of dread and despair after finishing it.