Oh, found this in a search for Sengoku Rance. I'm surprised I didn't see it on here; I'm sure it is, I remember seeing it, and I've noticed things I know are here don't always show up in searches for some reason.
Er, digression aside, I thought I'd weigh in, since this is only a few months old, and no-one else has yet:
You might want to check out
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. I've never actually beaten either, but I've got reasonably far in both, and they seem to have a lot of similarities. Pretty sure Big Bang Age has a huge, branching plot complete with looping NG+ too.
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is another amazing series. It's the least similar in that you're not conquering land/territory... you are delving deeper into a dungeon though, but you don't actually manage your provinces or anything, you just try to get further. It's also got fairly interesting and endearing characters.
I like what I've played
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, too, and it's got some similar elements. It's a machine translation on here, but I don't think it's especially bad, and I've played a couple of games recently that weren't machine translated, but felt way, way worse.
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is kinda slow to start with, the beginning feels like much more of a visual novel then SR, but I remember it picking up quite a bit. If nothing else, it's novel for a while.
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is even more of a visual novel. There's a sort of pre-text of commanding armies, but there's not really strategy in that you'll have to out-flank your opponents, there's basically just a right formation to use for the scenario. It's still pretty interesting to me though.
That's pretty much my entire list of (H) games that I found and liked after Sengoku Rance, while I was still looking for something similar. I'd recommend the top two to anyone who likes eroge period, they're both excellent titles. Reception of the next three may vary based on personal taste, but I liked all of them, and I'd say they're worth a shot.
Edit:
I thought I'd add
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here too, since I just got a like, which I guess means people are still bumping into this. At first glance it looks like a Sengoku Rance clone, but the gameplay is totally different. It's not super in-depth or involved, but I had a lot of fun with it.