2015 · ソースブック（プレイを拡張するルール／オプション）
Rituals of the Deep Ones
This occult supplement presents 10 rituals centered on the watery depths and the mysterious deep ones. Designed for use by spellcasters or non-spellcasters, the rituals allow characters to commune with deep ones, aboleths, and krakens; summon storms; recover treasure from the sea floor; and create magical whirlpools that serve as gateways across oceans. It also includes a fictional introductory tome, suitable for reading aloud or giving to players, along with suggestions for incorporating the rituals into a game.
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。