Ori is my favorite single player game.
I played through the story 3 times to get the achievements and I never had even an inch of boredom.
I'm still trying to beat it on One-Life mode from time to time.

The way Ori floats through the map accompanied by the amazing visuals would already be enough reason to pick it up. And once you start progressing you pick up various abilities which allow you to get to places you couldn't before. Making it fun to backtrack the map before you progress the story, to pick up various collectibles.

The way the story progresses with four important items to obtain in differently themed places is very satisfying and rewarding. Each introducing new elements of platforming.

I'm gonna beat that One-Life mode one day..