2009 · 资料书（用于增强玩法的规则/选项）
Alien Creation Guide
A supplement for Modern d20 campaigns that provides rules for creating balanced, playable alien species. Players and game masters define a species concept, adjust ability scores, and purchase traits such as wings, claws, special attacks, psionic powers, skills, and feats with creation points. Drawbacks provide additional points for customization. The guide also includes advice for developing communication, appearance, society, culture, aggressiveness, independence, determination, and technological development. Sample races, species templates, and racial levels for more powerful species are included.
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）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 Alien Creation Guide
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。