2005 · ソースブック（プレイを拡張するルール／オプション）
Rats in the Walls (d20)
A d20 Fantasy supplement focused on dire rats, wererats, and other rat-like adversaries. It provides encounter ideas for evocative locations such as sewers and infested ruins, along with new rules options including the Tail Fighting feat, the crippling Gutgnaw curse, and the supernatural powers of the Rattenkonig. The material supports campaigns in which rats and their kin serve as enemies, hazards, or central threats.
- プレイ人数
- 0
種族ベース（プレイヤーの種族/種がゲームプレイに影響する）ダイス（主にd20）ダイス（各種）
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。