Maybe RPG isn't the correct term. Fantasy card game suits better. From what we have so far, the entire card game is one quest and storyline. Additional expansions would include an additional quest each. Maybe we can include a few sub-quests hidden in the maze? What ideas do you have?
Would you like to be part of designing of the game? If so, send me or isorun your e-mail address and we'll include you in our design document.
