Experience Orbs are in Fable, Fable: The Lost Chapters, Fable Anniversary and Fable II. You gain experience orbs by killing enemies and eating certain foods or ingesting some potions. They are used to upgrade yourself in the ways of Strength, Skill and Will. In Fable and Fable: The Lost Chapters, you have to go to The Heroes' Guild to upgrade by going into the green light in the Map Room. In Fable II, you upgrade by going into the Pause Menu and choosing Abilities. In Fable and Fable: The Lost Chapters, you can acquire General Experience by shooting Green Experience Orbs with your bow .