2003 · ソースブック（プレイを拡張するルール／オプション）
Western Europe
This 144-page supplement helps GMs and players develop a detailed medieval fantasy setting shaped by D20 magic. It provides guidance and game-ready information on kingdoms, cities, manors, aristocratic wealth, landholding, government, religion, and everyday occupations. Generation and construction systems cover settlements, fortifications, economies, and population, while an economic simulator helps determine costs, incomes, cultivated land, building numbers, and other practical details. The material supports campaigns involving abandoned keeps, political influence, noble finances, and the path from adventurer to ruler.
キャンペーン設定（ゲーム世界）スキルベース（スキルを購入または獲得）クラス制（パイロット、ウィザード、サイエンティストなど）ダイス（主にd20）
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。