Three ways in: play a browser case, host a kit, or print an original mystery. Films and books sit one step sideways.
Looking for the movie, the book, or a Hallmark schedule? The 2022 and 2014 films named A Christmas Mystery are on the movie table. Jostein Gaarder's novel is on the book table. I am not publishing a Hallmark countdown page until a dated schedule can be maintained.
What I would open first
If you want something on a laptop tonight, start with the game table. The only title I found that runs in a browser without a download is Christmas Mysteries on the publisher's own site. The cat-finding games and the itch.io horror pair are downloads.
If you are seating guests, use the kit comparison. Ho Ho Homicide showed a $35–$110 player-band price range when rechecked on 14 Nov 2026; the separate itch.io advent file was $12. Several My Mystery Party pages returned no price, so those cells stay empty.
If you want paper, the printable kits on this site are original. They are not copies of a commercial script.
Questions
Is there one game called Christmas Mystery?
No. The phrase covers browser hidden-object games, Steam downloads, party kits, films, and at least one novel. This site separates them.
Can I play a Christmas mystery inside this page?
Not as an embedded game. I did not find a publisher statement that allows a third-party embed. The hero opens the free printable. Play online goes to the game list, which links out to official pages.