Sorry if this is easily answered someone else, after a brief Google and search of the subreddit I didn't really find anything other than contradictory statements so I figured I'd just ask directly here;

I've been playing offline for about a month, because of lack of regular internet connection, and I've been completing a few games on higher difficulties from before and as Civ's I'd never finished a game as yet. I've read, among other things, that it autoupdates achievements when reconnected yet so far despite being connected it hasn't.

Is there something specific I need to do? Is it something else? Does it not keep track offline at all? Any info is appreciated, and thanks in advance.