Day Four - Possible Unused Game Mechanics

Our instructor, Kim, showed us a website with 20 unused game mechanics:

http://www.gamesetwatch.com/2007/11/opinion_20_underused_game_mech.php

Looking at the list, there was one that stood out as one we could possibly use in our own game: Annotating Maps. At first, the player won't have a map, but can buy one. We figure that once the player buys a map, they can annotate it with their own notes as to what they may have found out about it. It would be a good way for the player to keep track of areas they have found or things they may suspect is there if they are going around.