Darkness, darkness, practically everywhere, in this game. I found myself praying for lightbulbs! I found that moving to an outside scenario for most of the game somehow diluted the overall spookiness, as this game didn't unnerve me half as much as the previous two Delawares, which were set largely inside large, crumbling buildings and scared the bejeebers out of me.
Plus, that hunt for a particular object at the beginning of the game drove me bananas; I was wandering around for hours in growing frustration.. finally had to peek at the walkthrough to find out where on earth it could be. Never quite got over the grump factor after that.