There's a really nice Dragon Quest XI: Echoes of an Elusive Age theme going free over on the PlayStation Store right now in both North America and Europe. It's a static theme with no unique background music, but it makes good use of some lovely character-based artwork.
In Europe, nabbing the theme will also get you a set of avatars, each one of them a member of the main party from the game. In North America, you'll have to go and download the avatars separately.
Will you be adding this one to your theme library? Gather your allies and embark on an epic quest in the comments section below.