I'm thinking of grabbing the EU4 DLC I'm missing, I fell behind three of them ago and they are apparently really good. As for them showing up on GOG, Paradox is here, but EU4 is in the middle of its lifespan so that's unlikely to show up until its run its course.
Vicky2 might though, its last expansion came out a while ago, although the Vicky games are a little... rough. Paradox for a while made fascinating games that were a little janky and buggy and had bizarre and poorly explained mechanics. They've gotten better, and that's not to say the games from before are bad, but their games pre-Crusader Kings 2 are all in that area, and unfortunately Vicky2 is square in there.
Edit: Also the pre-CK2 games had this annoying thing where the expansions are basically needed, patches released after are only for the expansion, even if it's something that would affect pre-expansion stuff too, and in pretty much all cases the expansions are pretty much necessary to get the best experience. Vicky2, for example, is nowhere near as good a game without the expansions. Post-CK2 they've added a bunch of stuff in every patch, even if you don't get the DLC, it's pretty sweet.
Post edited October 04, 2015 by doccarnby