2003 · ソースブック（プレイを拡張するルール／オプション）

Hell on Earth 1939-1945

This d20 campaign setting places adventures in World War II, from the beaches of Normandy and occupied European cities to the jungles of Burma. Scenarios cover espionage, commando raids, resistance operations, aerial combat, and survival behind enemy lines. The supplement includes a historical timeline, wartime allegiances, ten advanced classes such as Commandos, Spies, Combat Pilots, Snipers, and Nazi Occultists, and new feats for modern warfare. It also provides rules and details for hundreds of vehicles, weapons, and equipment, along with aerial combat and difficult driving conditions. Optional supernatural elements include ancient artifacts, experimental weapons, empowered heroes, and monsters such as gremlins and foo fighters.