As a game it's difficult to evaluate Yume Nikki for me, since it's purely exploration of the world and everything in it is largely up to you interpret it how you will. And I don't think it would work any other way. Keeping it abstract, vague and minimal is why it is so good.

There is a loose objective to collect all the effects and unlock the ending, but I don't think it's the ending that makes this game special. Figuring out the history of Madotsuki and the reasons for her reclusive behaviour from the surreal landscapes and events in her dreams are the essential part of the journey. Whether it's from your own theories or engaging with other peoples interpretations.

It's a haunting experience. One that's always persisted on the back of my mind - now for over a decade. Every once in a while popping back to the surface. And I can't speak this way for many other games out there - if any. The 5 star rating is really for the game, the legacy surrounding it and its fandom. Which is easily the greatest on the internet. It's amazing this mysterious indie piece from 2 decades ago has influenced some of the most beloved indie titles today!

Happy 18th anniversary Yume Nikki.