Mission Kursk Patch 1.4
Mission Kursk Patch 1.4 Download
Rhineland: I can't answer that, since I don't own those two games, but I highly doubt GOG included inofficial addons. I think they don't do it, because very often 3rd party content isn't that good qualitywise. The examples that I mentioned are patch mods to be precise. Such games are usually abandoned by the devs while still having (often crucial) bugs and the games still have/had many active players, still quite popular. So such mods can be considered of high value.Mission Barbarossa/Kurks addons are additional campaign, scenarios. Bonus, additions are always nice.
Mission Kursk Patch 1.4
I don't see why they can be considered of low quality, unimportant, or uninteresting.Maybe it's not only GOG's decision, but also the publisher. Perhaps it's a pricing issue.