Where Are Millennia Save Files Located?
Millennia follows Unity save patterns with Steam Cloud cover, keeping campaigns in per OS app data folders.
Last updated
Millennia runs on Unity, so saves follow the engine pattern: a developer folder under AppData LocalLow on Windows, with platform equivalents elsewhere. Steam Cloud mirrors the same slots under app 1268590. The wiki page lists no exact folder yet, so treat the pattern as the map.
Check LocalLow for the publisher or studio folder when the literal path misses, since Paradox published titles vary the middle segment. Back up the whole folder with the game closed. Multiplayer saves resolve host side, so guests keep nothing to migrate.
Where Millennia stores this, by platform
%USERPROFILE%\AppData\LocalLow\C Prompt Games\Millennia
Exact folder name unverified, check LocalLow publisher folders if this does not match. Steam Cloud covers app 1268590. Copy the parent folder whole.
~/.local/share/Steam/steamapps/compatdata/1268590/pfx
Proton mirror of the Windows pattern above. Exact path may vary by library location, check libraryfolders.vdf on multi library setups.
Frequently asked questions
Does Millennia use Steam Cloud?
Yes for app 1268590. Keep manual LocalLow copies too, since cloud conflicts after long 4X sessions can pick the older autosave.
Where are Millennia multiplayer saves?
On the host machine in the same folder tree. Guests hold no canonical copy, so the host must back up and distribute continuing campaigns.
Notice an outdated path? Let us know.