2007 · 资料书（用于增强玩法的规则/选项）
D20 Firearms
A rules supplement for adding firearms to modern d20 settings. It provides a simple system for using guns in combat, reflecting action-oriented play in which characters can survive gunfire without every hit being immediately fatal.
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 D20 Firearms
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。