What games have what you’d call really good worldbuilding, and what in particular do you like about them?
https://en.wikipedia.org/wiki/Worldbuilding
Worldbuilding is the process of constructing an imaginary world or setting, sometimes associated with a fictional universe. Developing the world with coherent qualities such as a history, geography, culture and ecology is a key task for many science fiction or fantasy writers. Worldbuilding often involves the creation of geography, a backstory, flora, fauna, inhabitants, technology, and often if writing speculative fiction, different peoples. This may include social customs as well as invented languages (often called conlangs) for the world.
One detail that held to me the strongest is the characters’ talking patterns. It feels like dialogues were written in another language and then converted to English. The strongest example I think was the lady that gives the Knight flowers for delivering, which also is added to, iirc, being at least implied she is one of the oldest creatures in Hallownest.