Not sure if this has been proposed as an idea but what if the biters all started as innocent non violent aliens. That you can walk up and walk around no problem. When the pollution reaches them they then mutate and become aggressive, more pollution more aggressive. Kind of like how the game never th...

I have looked around to see if anyone has requested this or if it exists and i have not found it. I also cant recall if this effect is already in place because i have only played one game of factorio that's 60+ hours so far so i cant remember if i started in brown ish grass or not. The idea is prett...