2007 · 资料书（用于增强玩法的规则/选项）
The Wild Outdoors: Rules For Surviving In The Wilderness
This rules supplement covers outdoor survival for characters in d20 Modern and d20 Future settings. It provides guidance for environments ranging from freezing Antarctic expeditions to desert planets, combining material from the d20 SRD with new rules for handling wilderness conditions, exploration, and survival in one volume.
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）
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