Factorio Forums

I just loaded my modded big save without any mods in 2.0.66 Windows and a bunch of achievements unlocked retroactively on Steam after loading finished.
I guess that's not right - a modded save should be marked as modded forever and never unlock Steam achievements again.

What I did:
Yesterday:
- start Factorio 2.0.66
- deactivate any mods except the 4 integrated Space Age mods
- play with a new map and save
- terminate Factorio

Today (just now):
- start Factorio
- load my big old (modded) save by choosing "Load" and not "Sync mods and load".
- after a few seconds, achievements were unlocked on Steam I had in the modded save but not yet on Steam.

When I look into the ingame achievement list, the achievements seem to have been reset or switched to the Steam set of achievements. All the achievements I got with that save in its modded state are gone and have been replaced with the achievements I had from the time I played without mods, which is years ago.

The achievement list also doesn't tell this is a modded save - it seems the game "forgot" there were previously mods loaded for that save.

I have many old saves of that map, no matter which save I load it's appearing as unmodded if I load without mods and actively contributing to the Steam achievements.

I didn't tamper with Steam, or with the game client or with the save (I know there is some "achievement enabler" app, but I didn't use that ever).

If required, I can provide every file from the the %appdata%\Factorio directory and from the Steam userdata directory from before I started Factorio today with the original achievement data files; I do backups and it happens the daily backup just ran a few hours ago.

Thanks for the report, this is a duplicate of 45969.

Tertius wrote: Mon Sep 08, 2025 9:47 am When I look into the ingame achievement list, the achievements seem to have been reset or switched to the Steam set of achievements. All the achievements I got with that save in its modded state are gone and have been replaced with the achievements I had from the time I played without mods, which is years ago.

The achievement list also doesn't tell this is a modded save - it seems the game "forgot" there were previously mods loaded for that save.

Modded and vanilla achievements are stored in separate files and are global for all save files. It doesn't matter the save file had mods before, what matters is the current state.