Sorry, just checked Dig Deeper and it's currently outdated. Why I suggested it in the first place is because I've played it before and it's in all ways more challenging. Higher mining costs and goblins replaced with orcs that have trap avoid. So we should have to go along with Civilization Forge Mod or Genesis Mod, both seem okay.
Im looking at
Genesis mod now...
* dragons, sea serpent and hydra get "dragonscale" which can be tanned and is twice stronger than a leather.
But lacks balls.
* genitals' size is lowered.
* goblins get bronze.
But! The goblin civ is a little tougher and the big monsters (hippo, rhino, elephant plus) have tougher skins, muscles, bones, for fun.
There's also a hostile werewolf civ and illithid/mind flayer civ.
I'm sure if Genesis makes the game better flowing.
Looking at
Corrosion mod
http://www.bay12forums.com/smf/index.php?topic=81068.0"Fortunately, there were survivors. People who refused to take the drug, some rejected it for religious reasons, others for political, some never took medicine to begin with. Nevertheless all of them were considered idiots, savages, and outcasts. Yet here they are, a band of hastily strewn together men and women who are expected to hold back the hordes."
Sounds good!
additionally
# New Food and harder to get food!
# Nerfed Traps (tell me if they’re still shredding limbs)
# Training workshops
Have you played Corrosion? We should try Genesis Mod.