Heej, The game showed me a screen with "congrats you've beaten all locations" or something in that line, and in the settings, I also see it as all locations complete but the achievement didn't pop. I have restarted the game a few times and also have restarted steam but both didn't help....

Devs, you might wanna check the store's user tags and remove a few if you can. There's a few that... don't fit.