I don't think graphics are only engine related.
This game was made with unity and it looks awesome
https://store.steampowered.com/app/261570/Ori_and_the_Blind_...
https://store.steampowered.com/app/261570/Ori_and_the_Blind_...
http://dcgi.felk.cvut.cz/projects/pacman-benchmark/thesis-co...
FWIW it's a good piece of code, and i like it.
Album on bandcamp, but feels much better in the game: https://garethcoker.bandcamp.com/album/ori-and-the-blind-for...