2013 · ソースブック（プレイを拡張するルール／オプション）
Catacombs
A d20 fantasy campaign compendium compatible with Pathfinder and Dungeons & Dragons 3.5. It combines material from three setting books with previously unpublished content, including revised playable races, base and prestige classes, feats, equipment, spells, magic items, monsters, NPCs, and campaign guidance. The book also includes rules and equipment for World War II-era play, 18 campaign starts, and two full adventure modules. Its contents are designed for use within this setting or alongside other campaign worlds.
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）レベル制（XPを獲得してレベルアップ）
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。