SimVillage

SimVillage is probably an actual game produced by Will Wright at some point, since we've had a Sim of just about everything (SimTower, SimIsland, SimEarth, SimAnt...), but in context of Arcana it refers to the system whereby you build your village from the ground up.  From the outside it'll always look the same, a bunch of buildings of various shapes and sizes (actually, they're pretty much all squares or rectangles, but you get the point), but the interior changes depending on what you designate each building to be.  Lumberjack, Blacksmith, Factory, Mages Guild, etc.  It's a really complex system that includes about a dozen different variables just in keeping track of the building material, goods, luxuries, and manpower required to build these things, and the individual door events on each building are gigantic labyrinthes of conditional values and variable controls.

Also, since the XP event page program doesn't have a find and replace function that I know of, the variable that tells the system what kind of interior a particular building will have has to be manually changed every time.  The whole process takes only five or six minutes, but it's dull and monotonous and, since there's about eighty buildings all told, daunting.  Now if you'll excuse me, I need to go back to the salt mines...