Map of the dungeon annotated by the user Demajen and posted on the Steam guide Dark Devotion: Map + Books Map
From Map[]
Face off against The First One while equipped with Templar Gear.
From Steam Page[]
Update (November 2020)[]
It turns out that the map wasn't as 100%y as I first thought. Check out the comments section for extra bits and pieces that people have found in the 18 months since I last played the game. ~Demajen
Other[]
Updated due to error pathing to Templar's Sword.
The room numbers were pulled directly from the code.