Download Link (350 MB)
This mod includes 100 fictional maps, and improves the in-game terrain graphics.
To install, use 7zip or WinRAR to open GcmRandomMaps4a.7z after downloading it, and drag the two folders from the zip into your Mods directory. (Click here for a screenshot of installing a mod.)
After installing, this mod will take 2.3 GB of space.
Then start the game, go to your Modifications menu, and enable GcmRandomMaps4 and GCM_Terrain4. The maps will be available in your Sandbox menu and the terrain will be enhanced.
Click here to see all 100 minimaps

If you play the GCM Singleplayer Campaign, you can install these as normal, and the singleplayer campaign will add these to the mix of maps it uses.
Feel free to modify / redistribute these maps any way you wish.
Here's what the maps look like with the terrain mod enabled:

