Evolve VS Dawn-of-Civilization

It seems I somehow fucked up the possibility to choose Isolation in Truepath (I filed a bug report here: https://github.com/pmotschmann/Evolve/issues/928).

Evolve has open source code, and it's somewhat readable. It uses Vue.

Download the game files from https://github.com/pmotschmann/Evolve (you can do this with git, or clicking on "code" near the top right and then downloading the zip, then unzipping that file)

I had that happen too, then after a while it was corrected: https://github.com/pmotschmann/Evolve/issues/664

that covers most things, not sure what else you are looking for. Just look at the strings.json

And many(most?) don't. In fact, many, games, even have, their repos available under permissive license that you can use for your own work.

While I was searching, though, I realized that one of the files (space.js line 5768 at the time of writing) contains the data for a "zombie" species: A tooltip, a description, planet names, etc etc... Seemingly everything needed for a playable race. They don't appear to have any traits, and they seem to be related to the custom race mechanic in some way, but since I haven't reached that point yet I can't really make sense of the code. Are they a placeholder in case something goes wrong? Or maybe is it just the set of default options that first come up when creating a custom race?

So far, I see only the successor to Rise and Fall (https://github.com/dguenms/Dawn-of-Civilization). I can't find anything for A New Dawn or Ffh2.

Check the shortcut properties and see if it is directed to the proper location. You might have Civ installed in an unusual place. I never deal with the installer, just grab the latest version from https://github.com/dguenms/Dawn-of-Civilization - code > download zip, extract to mods\RFC Dawn of Civilization.