I'm really puzzled by this. Achievements are not working for me and haven't for some time.
I have ONLY graphical mods selected that are compatible with the current patch. My checksum is also correct.
Any ideas?
There is the Major Checksum (hardcoded into the gamefiles and seeable in the proper menus).
And the internal checksum being used for checking if you got the same game version (for joining).
Anything that affects or adds a .txt, .csv or .lua file to common is changing the later checksum.
This includes every Namelist.
It also includes Mapmodes.
As they need to add "Graphical Cultures" (a textfile format), Ship and Citiscape mods also affect it.
I am not even certain about portraits. After all there is a bunch of installed ones that are not selectable.
The moment the mod carries a textfile aside from the manifest, you can bet it will break archievements.