2023 · 资料书（用于增强玩法的规则/选项）
Between Two Worlds
A third-party monster manual for use with Old-School Essentials and other old-school fantasy role-playing games. It presents creatures and encounters involving interdimensional travel, reality-warping experiments, alien visitors, supernatural guardians, and beings from distant worlds. The collection includes complete monster entries, including a destructive many-limbed angel, a creature made from dozens of people, insect-faced bugbears, slug-like tourists, a frost giant with a dungeon, a world-crossing beast of burden, a ghost-summoning helmet, and an interdimensional spirit trader.
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 Between Two Worlds
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。