2021 · ソースブック（プレイを拡張するルール／オプション）
Maustrap
A pre-campaign funnel for Mausritter, in which each player controls four common mice burdened by debt. The mice explore dangerous dungeons, search for treasure, and try to collect enough pips to clear their financial obligations. Characters are tested through hazardous adventures and may die along the way. Surviving mice become the starting characters for a subsequent campaign, while the rules keep the emerging story consistent, challenging, and grounded in the characters’ struggles.
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）ダイス（主にd20）
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。