Here is the full list of all 10 Jester`s Theater Museum achievements.
Visited First exhibit
Walk around the entire museum, visited all the exhibits
Ghost Key fully assembled
Fall into another world
Meet the Puppet Master at the end of the game
Find all Jack's head
All exhibits are visited and the spirits are free
All exhibits are visited and the spirits are walled up
Escape from the museum
All exhibits are sealed and Jack has been summoned.