2024 · ソースブック（プレイを拡張するルール／オプション）
Mythos Monsters (Black Flag)
This bestiary adds more than 40 eldritch creatures from the Lovecraft mythos to Black Flag roleplaying campaigns. It includes minions such as deep ones and faceless stalkers, inhuman horrors such as shantaks and nightgaunts, titans such as shoggoths and flying polyps, and major entities including Cthulhu and Hastur. The book also provides tools and templates for transforming ordinary monsters into pseudonatural xenoid creatures, with options for creating epic variants.
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。