The undisputed GOAT if all you care about is story and writing and world building is Disco Elysium. It's probably a little old hat to throw around at this point, but that's just because it's true. No other game is even close to the same level of writing. It's on par with a really good novel. However, as an isometric 2D game perhaps it falters on the immersion front.

Clair Obscur: Expedition 33 just came out, and I have only played a couple of hours. However it is extremely good so far and has been getting rave reviews. It's a much more modern presentation than Disco, if that's an important consideration.