A week or so ago, Nuadha’s Wednesday Weird was: The Barbarian
Role-Reversal. To be done with care.
Characters are inhabitants of a low-tech world, possibly with psionics. They have journeyed a great distance because of talk of strange demons who have come out of nowhere to live among the members of a nation.
When they get there, they discover the green skinend demons came to the world in a ship of metal, and have “magical” toys and tools far beyond the artifice of people on this world…
Its a reversal of the De Camp Krishna novels. This time and in this campaign, the players are the lower-tech natives and are considered barbarians by the aliens.