2006 · 战役设定（游戏世界）
Empyrea
A d20 System supplement presenting an alternative cosmology for fantasy roleplaying settings. It expands the structure of game worlds with new planar concepts designed to work alongside the planar systems of existing campaigns.
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）
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。