The Place of the Skull (d20)
A princess has been kidnapped¸ the characters must save her by traveling over barren wastes and infiltrating a strange fortress of unknown origin. Within¸ weird tech¸ mutants¸ and evil swords abound. A scenario for 2nd-4th level adventurers. Written with Lamentations of the Flame Princess rules but easily playable in any OSR or new school system.
Check out my other works The Witch Shack and Colony of Death