Is that in progress?

Man would love to give this a go!!!

Would love it too, someone said developer wont update it, but maybe it wrong. At least we could hope someone made fork and update it

A bit late, but Enemies has been majorly overhauled. It's basically ready to go, other than balancing, but expect it to be considerably more difficult now. As the maintainer working on it, I've taken the step of preemptively adjusting the game's default evolution settings to not make it too overwhelming.

In summary, enemies will now come in 7 different breeds, each with a full 8 tiers of biters, spitters, and worms. Each type has its own gimmicks, strengths, and weaknesses, and enemy bases will now tend towards having only a single faction in order to make them more distinct.

Bob's mods have been updated! It doesn't include Space Age integration though. That will come in a future release.