2026 · ソースブック（プレイを拡張するルール／オプション）
Dark Devilry
A Shadowdark RPG supplement presenting eighteen infernal rulers, including archdevils, demon lords, and ur-daemons. Each has a write-up, stat block, artifacts, minions, hoards, and stronghold rules. The book also adds three classes, new ancestries and spells, and rules for possession and infernal contracts. It is designed for Shadowdark and can be used with other old-school fantasy role-playing systems.
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）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。