2003 · ソースブック（プレイを拡張するルール／オプション）
The Book of Fiends
This fantasy roleplaying supplement details the devils, demons, daemons, and other creatures of the Lower Planes. It includes more than 130 illustrated creatures with complete D&D 3.5 statistics, covering challenge ratings from 1/2 to 40, along with information on Gehenna, the Nine Lords of Hell, Demon Princes, celestial choirs, and fallen angels. The book also presents two core classes, four prestige classes for servants of Hell, epic-level progressions, and details on cities and rulers of the Lower Planes. An index by Challenge Rating supports encounter planning.
スキルベース（スキルを購入または獲得）属性／ステータス制（STR、CON、PERなど）レベル制（XPを獲得してレベルアップ）
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。