If you played Civilization, the terrain concept of Strategilization is familiar to you. There are 4 water and 4 land terrain types, and land terrain can have various overlays.
Water terrain:
- Ocean
- Sea
- Shore
- Fresh lake
Land terrain:
- Grassland
- Plains
- Desert
- Tundra
Overlays:
- Hills
- Mountains
- Forest
- Jungle
- Marsh
- River