Originally posted by Craig 🎃:

Originally posted by FuFo Mortucus:

never managed to ruin any save game files ever in 20 years of gameing .
and i mod out the wazoo

It's not a user end issue, it's the Steam cloud and possibly the developer's end.

Correct.
I don't use any mods, and it still happened twice actually. The first time was a while ago and it wasn't much of a rollback.