New Terrain Types
As v3.0 introduces new species types that can exist at much lower temperatures than oxygen breathers, I have added twenty-five new dominant terrain types.
The extra terrain types extend the existing list rather than duplicating existing conditions. Most of them are for frozen or very cold worlds that would previously have just been barren, plus a few for hot worlds and those with extreme tectonics. None of the new types require water. Instead, most require the presence of specific atmospheric or frozen gas, which is not a requirement for the existing types. Several of the new terrain types are also classed as desert worlds for combat purposes.
For example, Nitrogen Ice Fields requires the presence of frozen nitrogen, which means temperatures below -210C. Ammonia Salt Flats requires ammonia to be present in the atmosphere and range from -78C to -33C. Sulphur Ice Mountains cover a range from absolute zero to -72C and require Sulphur Dioxide to be frozen on the surface, while Lava Fields are only for worlds with extreme tectonics and have a 0.5 fortification modifier, making them difficult to defend.
The Methane, Ammonia and Sulphur races will often inhabit cold or waterless worlds. As hydrosphere is not a requirement for the new types (replaced by the atmosphere requirements), they provide the new species types with a variety of terrain types for worlds that would otherwise be generally barren.
The total number of terrain types is now sixty-seven.
