The ".rar" file for the Collector's Edition (CE) typically includes several bonus features accessible from the main menu:
Use the map for fast travel between locations. Mystery.Case.Files.Black.Crown.CE.rar
Some scenes blend puzzles with hidden object lists; be prepared to interact with objects (e.g., using a corkscrew or bayonet) to find required items. Collector's Edition Extras Mystery.Case.Files.Black.Crown.CE.rar
Look for morphing coral and hidden crabs in every scene. Missing items can be picked up in the "Extras" section after finishing the game. Mystery.Case.Files.Black.Crown.CE.rar
A standalone adventure where you help a Voodoo Shop owner.
To break the curse, place the Black Crown on the bust of the deceased voodoo priestess in the Captain’s Quarters.