2018 · コアルール（プレイに必要な最小限）
Rats in the Walls
A tabletop roleplaying game of cosmic horror that channels the tone of early 20th-century weird fiction without using established mythos lore. Players create investigators from a rules-light system designed for both one-shot scenarios and longer campaigns, resolving actions with a simple mechanic focused on risk and consequence. The core book emphasizes mood, investigation, and gradual escalation of dread as characters explore hidden threats and degrade mentally or physically. The default setting is the 1920s, with guidance for historical flavor and social context, plus an appendix for adapting characters and tone to a medieval milieu.
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属性／ステータス制（STR、CON、PERなど）ダイス（主にd6）
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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。