The Elder Scrolls (opens in new tab) series is rich with history (opens in new tab) of its fantasy world, far more than is actually present in the games, hinted at and detailed via in-game books, texts, and lore notes, not to mention exterior novels and the like. (opens in new tab) The Crusader Kings (opens in new tab) series, meanwhile, specializes in the grandiose, attempting as it does to model the incredibly complexity of medieval politics over a span of hundreds of years and a region stretching from West Africa and Iceland to Siberia, Tibet, and Bangladesh.
