Underground / ground stationary enemy bases to destroy, very strong, fortified :)
Pretty sure we’ll see more COG activity in the caves in the future ;)
This seems like an excellent idea however, you seem to forget that anything on the ground gets wiped away with the eruption, because of this you can’t have bases of sorts, Same happens with people requesting personal structures outside of the drillship.
^ This one is a bit different. It presents another kind of structure, that would be more of a puzzle kind of thing. It’s an interesting read.
I honestly recommend reading the merged posts.