Video games don't usually get into the Christmas spirit. Which is a shame! So it was nice to see that, upon reinstalling Crusader Kings II yesterday, I ran into this: a new holiday soundtrack to one of the most bloodthirsty games ever made.
Seems it came out last year, as free (and optional, you can disable it) DLC called "Songs of Yuletide". It will only play if your system clock says it's December, and is also available for Europa Universalis IV.
Just the thing to get you into the spirit of giving while plotting to murder your bastard son.