コアルール（プレイに必要な最小限）
Castle Oldskull
This old-school fantasy role-playing system introduces players and Game Masters to sword-and-sorcery adventures and character creation. It covers basic rules for fighters, thieves, clerics, magic-users, and demi-humans, along with spells, equipment, alignment, saving throws, undead, sanity, and optional skills. Modular rules let groups choose between basic and advanced levels of complexity while building characters and campaigns. Guidance explains how to learn, customize, and expand the system for new or existing fantasy worlds.
- プレイ人数
- 0
スキルベース（スキルを購入または獲得）ダイス（主にd20）属性／ステータス制（STR、CON、PERなど）
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。