2005 · 资料书（用于增强玩法的规则/选项）
Bad Dog
A 14-page PDF supplement for Haven: City of Violence and other d20 Modern games, this sourcebook adds loyal canine partners for player characters. It provides rules for acquiring and using a dog as a companion, with options for breed and special training.
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）
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。