2023 · ソースブック（プレイを拡張するルール／オプション）

The Game Master's Handbook of Proactive Roleplaying

A game-mastering guide for creating player-driven tabletop roleplaying campaigns. It replaces the traditional action-and-reaction structure with adventures built around the characters’ own goals, choices, and decisions. The guide explains how to prepare situations, factions, conflicts, and obstacles that respond to the party’s actions rather than leading them along a planned sequence of events. It also provides tools for making encounters consequential and keeping each session focused on the characters’ chosen paths.