1977 · 替代规则（核心规则变体）
The Perrin Conventions
An alternative set of combat rules originally developed for the 1970s edition of Dungeons & Dragons. The conventions organize combat procedures and sequence of play, covering a more structured approach to resolving encounters. They later influenced the combat systems of early editions of RuneQuest and were revised through several published versions.
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）
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用 Ludoya 玩 The Perrin Conventions
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。