Well given the top-down point-click interface, I think you mean factorio, which already has near-constant enemy attacks, bases, etc but they are low-tech zergs.

Well given the top-down point-click interface, I think you mean factorio, which already has near-constant enemy attacks, bases, etc but they are low-tech zergs. Factorio is a fantastic game, so I'm optimistic that copying that model might be good-ish.