2014 · ソースブック（プレイを拡張するルール／オプション）
Better Mousetrap (MM3)
A comprehensive sourcebook for Mutants & Masterminds 3rd Edition, covering expanded rules for creating and running super-powered adventures. It includes new skills, advantages, power effects, extras, flaws, complications, vehicles, weapons, headquarters, organizations, security systems, and crowd entities. The book also provides tools for classifying threats, designing villains and minions, resolving vehicle pursuits and combat, extending Extra Effort, and building organizations and headquarters. New villain archetypes, stock minions, solo villains, villainous organizations, drugs, poisons, super-weapons, and deathtraps support a range of superhero scenarios.
スキルベース（スキルを購入または獲得）ポイント制（ポイントを割り振ってスキルや能力を得る）特性／アスペクト制（性格がゲームプレイに影響する）
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。