What an amazing game, everything I liked about Dishonored is still there but even better. Plays mostly exactly like the first game but the overall experience is a little more polished. The level design is superb, managing to include the things it requires to be a great stealth game (multiple paths, a lot of verticality...) while making the maps seem realistic, not just levels in a game built with only gameplay purposes in mind, thanks in big part to their slightly strange looking but awe-inspiring and believable architecture. It's an odd world, but the story, lore and characters help you feel like you are visiting a real place.
Probably the best stealth game I've ever played, finishing it without killing or being detected has been one of my favorite gaming experiences so far.
More info: https://en.wikipedia.org/wiki/Dishonored_2