The 13th Doll Is A Licensed, Fan-Made 7th Guest Successor
The 13th Doll is a fan-created official follow-up to the cult classic, The 7th Guest, and it has a trailer.
It is a fan game, but it does use the 7th Guest license and takes place in The Stauf Mansion. The game is planned for release on October 31. For more on the history of The 7th Guest, head here.
[Source: 13th Doll]