SimMars is a mod for SimCity 4 taking the game to Mars. It will bring new buildings, transportation systems, user-interface and music and will replace the Maxis SimCity 4 content as far as possible, giving you the feeling to play a colony on Mars. The mod is still at beta stage. Beta 3 was released in October 2010.
The Terraform 1000 package is designed to simulate the changes apparent in terraforming a desert world into a habitable environment, a process that may take more than a thousand years. The Terraform 1000 mod is fully compatible with SimMars and SC4. It can also be used in combination with other rock and water mods.
There are three different terrain stages in the Terraform package:
Terrain 1 – Sandy Desert
Terrain 2 – Water
Terrain 3 – Green Beaches