2001 · 资料书（用于增强玩法的规则/选项）
d20 Class Construction Engine
A point-based system for Game Masters to create custom fantasy classes within the framework of the core rulebooks. The rules can also be used to reconstruct existing classes, accounting for their differing abilities and inherent balance issues. The engine is designed to remain largely independent of individual GM play styles and campaign settings.
技能型（购买或获得技能）基于属性/数值（STR、CON、PER 等）等级制（获得经验值并升级）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 d20 Class Construction Engine
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。