Mystery games are games where players must discover secrets that aren’t present at the beginning. For instance, in the game Abandoned, players must decipher notes in order to find out where to go in the odd area that they are trapped in. You must solve puzzles and figure out how to use mysterious items in order to help you progress through the game.
Sometimes players must read clues as well to try and figure out the next course of action. For example, in Lost in the Firefly Forest, players have to roam around a giant map that is often confusing and just plain odd. However, there are clues that you can read that will help clarify what you need to do in order to get out of the firefly forest.