Here is the full list of all 12 Nancy Drew: the Ghost of Thornton Hall achievements.
Everyone lives!
No spoilers for you! HEROIC!
For bravely looking at ghosts!
You're hip to all Thornton family secrets!
Just because.
At this point, we think that you just like doing stuff a lot.
You know your way around a teacup.
For being a bottle botherer.
You're a gin genie!
For leaving no ghost unturned.
You're quite a grave individual.
For trivia excellence.