I beat this game just after beating Rise of the Tomb Raider, I am just mentioning that becuase it took me long time to beat Thief than RTB.
It is a very long game to be stealth one. Very repetitive. However, it is fun and you don't get bored.
Graphics: to grey. Uses 1% of all the colors. But it doesn't look bad.
Sound and Effect: not bad, I don't have anything good nor bad to say in this department.
Story: too plain, but enough to follow something in this game.
Gameplay: very good, some minor issues when trying to X something.
Lenght: too long to bed a kind of game to have to be very patient. The repetitiveness is something that makes me felt I was wasting my time. I spent more than 20 hours on this game and it was empty. I mean It was fun. But, for example, once you have done 15 side missions you want to complete them all to feal you haven't wasted the first 15 hours of gaming.
The game involved of 8 Chapters for the main story. In addition, 25 missions from Bosso, 3 from Erim and 3 from Victtory. I completed them all.
Honestly, I tried this game because it was given for free in Xbox Live. However, I am not regreat at all. Just sharing my feeling about this game.
I recommend to play this game if: a) Have enough time to play and b) it was given for free or not paying more than 9.99
Thanks for reading.