Here is the full list of all 12 Wailing Heights achievements.
You have successfully completed the tutorial.
Good hunting. You found all extras in the game.
You found all the limericks!
You're a mean vampire
Found the book, lost your body.
We are Deadbeats!
Encore!
You exchanged all the ball talk.
Ordered everything from the Zombie Shop.
Zombie talk at the water fountain.
Why can't I understand this zombie?
Exhausted your interrogation techniques.