ARRPGA is collection of RPG scenarios with two modes of gameplay.
The first mode pits a party of 4 Heroes against an AI Dungeon Master. This mode of gameplay features random battles, premade quests, professions and an alignment system for the party of heroes.
In the second mode of gameplay, a 5th player takes on the role of the Dungeon Master, creating the challenges the adventurers have to face, narrating the story, and coming up with riddles for them to solve.
It is possible to play custom maps using this add-on using the second mode of gameplay (Human DM), the instructions to do so come included within the add-on files.