Ori and the Blind Forest!
The story, the gameplay, the progression, the level design. Everything just fits together perfectly and then there's the soundtrack. God, I love that game!
You know, I actually think it's the miniblocks datapack for Minecraft. That's the only "mod" that is included in every single world I play in. Every other mod in every other game is kind of optional, but I'll never play Minecraft without miniblocks ever again. Not that I use them a ton, but they singlehandedly managed to actually get me exceited for the wandering trader again!