Swords and Super-Science of Xuhlan is a campaign setting for use with the Warriors of the Red Planet Roleplaying Game. Published by Swedish RPG makers Svartkonst. It is quite good.
New character races: Mutant, Robot, Rogue Formian, Rogue Formiankin, Lizard Folk.
Rules for Psychic Combat and Super-Science Research.
Wyrd Stones, mysterious artefacts that let you manipulate the matrix of Matter, Energy, Time and Space.
18 new creatures including Spectral Walkers and Winged Squid.
Seven strange Alien Godlings.
Campaign map with 100 detailed hexes.
The city state of Yankara.
The Vaults of Illumination, a 22 room starting dungeon.