The Black Ballad

From the introduction:

The Black Ballad is a full adventuring campaign in the styles of Elden Ring, Shakespeare, and the morbid beauty of metal. Tales of tragedy, sacrifice, and the acceptance of mortality await your Players within the realm of the Sunless Crossing. A realm designed to serve the gods is thrust into a savage war between two factions that ignites from the lands of the living and spreads into the land of the dead. The Players’ choices throughout will determine not only their own fates, but that of the Sunless Crossing, the countless souls trapped within, and the cosmos itself! Each iteration features a different ending, allowing you to run this campaign multiple times with vastly different outcomes.