Here is the full list of all 18 DreamWatcher achievements.
Bring back order to the library.
Get all six quest books to unlock the Core.
Collect all codices.
Get all codex descriptions.
Save all librarians.
Get all map markers.
Return 1000 pages to Archibald.
Make a creature fall into nightmare fuel.
Lose all your health points.
Get the final relic.
Wear the dream kicks and nightmare claws.
Find one of the six Quest Books that will unlock the Core.
Start a new game after having saved the Library.