2016 · ソースブック（プレイを拡張するルール／オプション）
Tomes of Cthulhu
A reference supplement for Lovecraftian horror games, detailing 20 books of esoteric and forbidden knowledge, along with alternative editions and original sources for some entries. Each book includes its author, appearance, publication history, language, and the lore it contains, with guidance on the amount of knowledge revealed and its potential effect on a reader’s sanity. The collection features fictional works attributed to historical figures, imagined texts from before 1930, and one genuine historical book.
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）ランダム属性生成（キャラクター作成時）
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。