2015 · ソースブック（プレイを拡張するルール／オプション）
S. Petersen's Field Guide to Lovecraftian Horrors
A revised and expanded field guide to creatures from the Cthulhu Mythos and the Dreamlands. It presents 53 entities with full-color illustrations, size comparisons, habitat and distribution notes, life-cycle information, distinguishing features, observer warnings, and references to their appearances in Lovecraftian fiction. Entries combine material from two earlier guides with new illustrations and an updated layout, providing identification help for similar-seeming supernatural beings.
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無料・Web、Android、iOS対応
LudoyaでS. Petersen's Field Guide to Lovecraftian Horrorsを遊ぼう
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。