2019 · ソースブック（プレイを拡張するルール／オプション）

Dirtside

A wilderness survival supplement for Cepheus Engine and the Hostile setting, covering planetary travel across environments ranging from jungles and swamps to deserts, mountains, volcanic wastelands, and ice fields. Rules address movement, terrain, hostile atmospheres, radiation, poisonous gases, hunger, thirst, exposure, and extreme temperatures. Event tables generate hazards such as storms, strong winds, rockfalls, and caves, while additional systems cover foraging, hunting, and quick animal encounters.