Demigod is set in a future fantasy universe , and a mod doesn't doesn't necessarily need to resemble the main game, however this has just been a quick draft and if I do more work on it, I will try to give it a steampunky look
Indeed, you are right that a mod doesn't need to resemble the main game. I just wanted to point out that if you will do a mod which is sc-fi for a game like The Settlers/Imperium Romanum they won't go well together.