What is a Backer-Exclusive Side-Quest?

The intent of this reward is to collaborate with the backer on a side quest that can be added to the game. This would be curated so that it fits within the scope and lore of the game, but directed by the backer feedback.

These side-quests would be available to everyone who plays the game, but would be credited to the backer in terms of answering "who made this fun side-quest?"