There are rumors that a legendary ruby, the Heart of Saint Mattis, actually exists. Break into the the Northgate Cathedral, find it, and steal it.
Background
This is my second Dark Mod mission (Mission of Mercy was the first). This is a small-medium mission, with some extras. See below for hints.
My wife just gave me an idea for mission number three, so look for that next year.
I notice that Dragofer just released a mission today. I hope I'm not violating an unwritten protocol by releasing another mission on the same day.
Download
The mission is available in the in-game downloader. As well as here: https://www.dropbox.com/s/jah5svj5eagnhs8/heartstmattis.pk4?dl=1. (<-- NEW LINK. Per grayman's request, the name of the pk4 and map have been changed). Place the PK4 in your \fms folder. TDM will recognize it as a new mission.
I18n
I have not done the work required for internationalization.
OpenAL EFX
This mission uses it (version 2), so I recommend turning it on in the Audio Settings.
Thanks
Many thanks to the beta testers, who really helped me get this mission into shape: Cambridge Spy, Shadow, Jedi_Wannabe (who also did some performance work on the map), SuaveSteve
Thanks to Mike and Chloe for their outstanding voice work!
The cathedral in this mission was inspired in many ways by bikerdude's excellent St. Albans Cathedral. I haven't played all of the DM missions, but to me St. Albans is the gold standard of cathedrals.
Music includes Cantus Firmus Monks by Doug Maxwell/Media Right Productions (royalty free)
The video series by Springheel and Sotha were helpful and energizing.
Thanks to the entire Dark Mod community for building an amazing project.
Hints and Tips (warning: contains progressive spoilers)