I'm just being honest, I have played few games from this type(till the end).. AND this is the best action/stealth game I have played ever and now it's 2020, and I'm not even a fan of this type.
here is what I really find Unique in this game, you are choosing the time you want to spend before you get to the ending of the game by choosing the difficulty, I really advice you to go with hard! it's gonna take you a perfect time + a perfect enjoyment, you will feel that it's so real (and hard). going with normal will just seem a little unreal. my challenge to you is to go with the Expert difficulty, but as I said before if you are a gamer and you just want to enjoy and experience hard times then hard is perfect, I advice people like I was (intermediate players) to go with normal it's enjoyable and not easy. not to mention the Purist difficulty don't pick it unless you have played the game many times with the expert difficulty and you know every detail of the game.. otherwise it will be impossible.