Anime-BlackWolf: Just sit those ones out. We are NOT missing many more of those. So if GOG releases the next big bunch, the "Neptunia" series should be almost completely here.
Ancient-Red-Dragon: Not really, since the three mainline Neptunia games have been, shamefully, missing Achievements on GOG for many years, and still are.
The Neptunia games on GOG will never be complete until if & when the publisher gives those games feature parity with the Steam versions of the identical games.
I don't care about achievements, and I think neither to many others here. I've said this before but I think it's important to reiterate occasionally such as when you reiterate your desire for achievements.
If you want them, okay, you can fight for them, that's your right, but I'm going to fight for those of us who don't care about achievements and just want DRM-free games here. (personally I don't really care about the Galaxy requirement for multi-player but that's another topic)