Core Elements
A streamlined d20-based roleplaying system that provides a basic framework for running a game or developing a custom ruleset. It can be used as written for barebones play or adapted as the foundation for a publishable game, with the rules released as Open Game Content.
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 Core Elements
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。