A traditional role-playing game, or tabletop role-playing game, is a form of role-playing game (RPG) in which each person playing the game will make-believe that he or she is a character in the game. A person playing the game will tell the action of his or her character, and a system of rules will tell whether the action can be done or not. The game will happen in a made-up world that is controlled by another person playing the game, called a gamemaster (GM). The gamemaster tells the game's story to the players, tells them where they are in the game world, and plays the part of all the Non-Player Characters (NPCs) and monsters that the players meet. 