2006 · 资料书（用于增强玩法的规则/选项）
The Hidden Treasure of Ghyr
A fan-produced gazetteer covering Ghyr, the fourth region of Mystara to receive treatment in the GAZ F series. It also serves as the final gazetteer in the Idris cycle, providing setting material for adventures in the region.
等级制（获得经验值并升级）职业制（飞行员、巫师、科学家等）基于种族（玩家的种族/物种影响游戏玩法）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 The Hidden Treasure of Ghyr
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。