2021 · 资料书（用于增强玩法的规则/选项）
Crawfolk
An aquatic species and character class for fantasy tabletop roleplaying games, designed for use with Old-School Essentials. These sapient crustaceans wield mud magic. The material includes a class description, an advanced species description, and a sample monster stat block.
基于属性/数值（STR、CON、PER 等）等级制（获得经验值并升级）职业制（飞行员、巫师、科学家等）
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。