2004 · 核心规则（开始对局的最低要求）

Gamma World Game Master's Guide

A game master’s guide to a post-apocalyptic world shaped by war, disaster, mutations, and secretive alliances. It provides advice for adapting d20 Modern-based rules, balancing adventure and danger, and planning campaigns from their opening scenes through their conclusion. The book also includes guidance for adding new mutations, technology, and other ideas to an ongoing campaign.