The world
Arkadia, a realm of swords and sorcery. In your dreams, a goddess of the moon warns you of a danger coming the next night. Nobody believes you. Then, on the second evening, something vast emerges from deep space, towing a small planet covered in modern cities. Neptune settles into orbit around Arkadia, and the skies are never the same again.
The Neptunians
They come down in SpellShips, flying galleons armed with laser cannons: scholars and merchants in cyberpunk style, studying the artifacts of your world, and studying you, from a distance. Their fleet blocks the way to the Moon, and Arkadia's great cities start looking for adventurers who can find a way up to Neptune: a world of eternal night, medieval and cybernetic at the same time.
How you play
Survival matters: travel takes days, food runs out, and supplies are scarce. Combat follows initiative, turn by turn.

