The 13th Doll is the 3rd game set in the Stauf Mansion, coming after the previous game, The 11th Hour. You reprise your role as Tad from The 7th Guest, still haunted by the occurrences from many years earlier. This was originally developed as a freeware title, but evolved into a fully-fledged commercial product.
This walkthrough is planned for a future date. Please check back again for updates.