2018 · 资料书（用于增强玩法的规则/选项）
Old-School Essentials Adaptation Guidelines
A conversion guide for adapting adventures from other old-school roleplaying systems into Old School Essentials terms. It focuses primarily on Labyrinth Lord, with references to B/X, BFRPG, LotFP, and S&W. Conversion material for the other systems is limited to an Armour Class Conversion Table.
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）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 Old-School Essentials Adaptation Guidelines
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。