1992 · ソースブック（プレイを拡張するルール／オプション）
L'Empire Ténébreux
This supplement for Hawkmoon details the Granbretan Empire for the game master. It covers the empire’s history and conquests, Granbretan science and its applications, the city of Londra, and the lands, peoples, cultures, and mutants of the realm. Rules for creating characters from these territories and several scenarios provide ways to confront players with the Empire of Horror.
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。