2014 · 资料书（用于增强玩法的规则/选项）
Aquatic Depths & Denizens
An Old School fantasy roleplaying supplement focused on underwater adventures. It provides rules for swimming, combat, and exploration beneath the surface, along with guidance for using magic and magic items underwater. The book includes five aquatic player races, undersea equipment, new spells, and more than 25 aquatic monsters for the Referee to use.
基于属性/数值（STR、CON、PER 等）骰子（主要为 d20）等级制（获得经验值并升级）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 Aquatic Depths & Denizens
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。