Shadow Tactics: Blades of the Shogun is a "hardcore tactical stealth game set in Japan around the Edo period", in which you'll need to control five loyal servants of the Shogun as they go out and ensure nationwide peace. What this means in reality is that you will need to go around the entirety of Japan and stab, slice, or explode people the Shogun doesn't like, all through the use of stealth and subterfuge as your motley crew is grossly outnumbered.
While I'm not sure whether I'm correct in my assumption or not, Shadow Tactics greatly reminds me of the old Commandos games, and that is a name I didn't expect to see when I woke up this morning. Have a look at one of the relatively recent developer-guided gameplay previews, you'll see what I mean:
If this looks and sounds like something you might be interested in, head over to Steam or GOG and check out the free demo. I haven't had the time to try it out for myself, but the response so far seems to be rather positive, so if you're a fan of stealth/tactics game it might just be worth your while.
As for the release date, Shadow Tactics: Blades of the Shogun will be arriving for the PC, Xbox One, and PS4 on December 6th. You can find out more, or just look up some fancy screenshots, by heading over to the official website.