Makes resources more sparse than base game. You will need to use trains much earlier to get resources. Game will be more difficult especially with higher enemy settings.
Tweaks
Mod category: Tweaks
Small changes concerning balance, gameplay, or graphics.
I will need a bit more details.
I grabbed all three Natural Evolution evolution mods from mod portal and it starts up fine with current version of RSO.
Do you have only some of them and/or any configuration changes done in mod settings?