Full list of all 20 Charon's Staircase achievements worth 1,000 gamerscore.
You have opened the guard's office in the forest lodge.
You have discovered the secret passage hidden in the catacombs.
You have entered Lewelin Mansion.
You discovered Dr. Lewelin's corpse.
You have successfully entered the hospital.
You survived an Omega attack.
You have arrived at the nuclear reactor.
You have collected the coin of Charon.
A happy ending?
You have retrieved the first document of the mission.
You have retrieved the second document from the mission.
You have retrieved the third document of the mission.
You have solved the puzzle of the Lewelin Mansion piano.
You have played the record on the gramophone and opened the door to the library.
You have completed the magic lanterns puzzle.
You have played the other piano in the Lewelin Mansion.
You have inspected the rings of Agatha and Arthemius Lewelin.
You tried to cross the lake before entering the lodge in the forest.
You've seen something moving on the lower floor.
You have collected all the pictures of the characters.