First of all: In my opinion, this is one of, if not the, best modern indie adventure games.
Let me explain why:
The first thing that comes to mind is Gabriel Knight- you play a private investigator in a kind of french-quarter-settings, with voodoo and supernatural elements present. Heck, there are even those dialouge screens with close-up portraits and black backgrounds. The gameplay is entirely different though: There are no inventory object puzzles- there are very few items, and when you have to use them, they are used automatically. Instead, you work with clues and have to interrogate people. That is what most of the gameplay consists of- interrogating people, gathering information. The clue is: The structure is way more open then with traditional point and click adventure games- when you feel you have enough evidence, you can close the case... And events further in the game change a bit according to your decisions.
The way the game is built, it feels way more streamlined than other games in the genre- there is no pixel hunting, no clicking around aimlessly seeing what fits with what. It has to be noted, you CAN bring yourself at some points in unwinnable situations at a few points quite easily, and no, the game does NOT tell you explicitly that it did. But it usually autosaves directly beforehand, so it did not seem like a dealbreaker to me.
Exploring and interrogating feels very ballanced and natural to me. Part of the reason are the sorroundings, the ambience,art style,music,atmosphere, the steampunk setting-everything just clicked for me, the worldbuilding is excellent, as is the voiceacting...the world really seems alive.
Although the game is quite narrative heavy, don't expect deep characters or character development.
I can't recommend this game highly enough- it is a oldschool detective adventure, yes, but one that finds new ways to innovate.