Khalil's_Black_Excellence
The King of Fighters
Interesting that so many in this thread like Ori. The first game couldn't keep me engaged, I think I just didn't like the aesthetics and atmosphere. Metroid, Castlevania and Hollow Knight have this "hopeless" atmosphere I feel that just keeps me engaged and on my toes. That game was a bit too cutesy and Disney-like for me.
Ori's art-style is it's main draw. It's practically 2d pixar level. Super clean and dope, but at the same time, compared to most games when it released, it had an unique aesthetic. I've seen a couple other games have that style since now tho. It's overall design melds together very well. Music was sublime too. Only thing that was missing from the first game was combat variety (you were mostly just dodging enemies in that one) and boss fights, to which both were fixed in the sequel.