Gloom
Most of the land surrounding your kingdom is covered in Gloom, a strange and mysterious force sent forth by a figure in the game known only as the Dark One. The Gloom envelops much of the land, causing sadness and despair, and your central objective in the game is to restore happiness to the land by pushing back the Gloom. You do this through exploration.
Exploring the Gloom in CastleVille
You’ll immediately see that all of the areas adjacent to your starting area are covered in darkness. This is the Gloom. With enough resources, you can explore these areas one at a time, and add them to your kingdom. Generally, you’ll need sufficient Castle Levels, Coins and Exploration Crystals to explore a particular area. The amount varies substantially by zone, and picking the right order for exploration is crucial to your success.