2005 · ソースブック（プレイを拡張するルール／オプション）
Attribute Feats
This supplement expands d20 character creation with a system of traits and flaws based on ability scores. Characters gain bonus feats from specific ability score combinations, adding further definition to their strengths and weaknesses. The rules are designed for fantasy, modern, future, past, and other d20 campaigns, and can be adapted to suit different genres and campaign styles.
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。