恐怖の谷
SecretBuilders Games has released in 2018 a casual game, "Dr. Watson Mysteries - Hidden Objects Game", where the protagonist is Dr. Watson, not Sherlock Holmes, but it features many Conan Doyle's stories such as "The Hound of the Baskervilles", "The Valley of Fear", "The Speckled Band", "The Silver Blaze", "The Musgrave Ritual", "The Gloria Scott", and "The Copper Beeches".