I played through coop with my GF so all but ~3% of the content was done together. However, her completion % is only like 50% and it has consistently lagged behind mine. Is this a coop bug or something?
Vilya answered a similar question that kind of explains it here: http://secretsofgrindea.com/forum/i...er-save-in-single-player-did-i-break-it.6213/
As such, since some of the completion is based upon things done in the world and not pure character progression, her percentage will be lower since you're progressing in your world!
Like Vilya said, we're going to add a system which makes it easier for clients to skip content they've played in multiplayer.
If you want to bring her world save up to speed right away with a workaround, you can open up the file explorer, go into %APPDATA%/Secrets of Grindea and look inside the Worlds folder! There you should find your .wld files, which you can copy and send to your GFs computer.
I did the archery thing, though it didn't change my percentage, surprisingly.
Hmm, I might've missed adding that to the completion calculation, actually! Good find!