Something like Kikokugai or Hanachirasu

[InvictusCobra]

I just finished reading Hanachirasu, right after having read Kikokugai. Are there any more like those in English? I feel as if they are an exception, so I'm honestly not too confident. It doesn't have to necessarily involve sword combat, since the dark settings and themes are what I want. Thanks in advance.

 

Also, is

Kaigen's Ambition any good or just a funny minigame with gag endings?

[Clephas]

You could always play Demonbane or Saya no Uta, both by the same company... but unfortunately, the one I'd prefer to recommend - Muramasa - isn't translated and probably won't be.  This kind of straight-out violence with dark, utsuge-type endings are pretty rare amongst tled VNs.