From Populous Wiki
Populous Undiscovered Worlds was an expansion pack for Populous III: The Beginning. It contains 12 new Singleplayer and Multiplayer levels. It also uses a few new effect (though actually avaliable in the original Populous, just never used):
- "Magical Stones" in level 7: Protection Racket and a multiplayer level called Walls by worshipping a stone head and creating eirther Magical Shield, Invisibility or Bloodlust between two scenery items (Green Stones).