Is there any reward for collecting treasures?
I am quite far into the game and have not received any awards for the treasures I've collected. Also, a friend of mine has completed the game and gotten all the trophies, and treasures did go unrewarded.
EDIT: If it's worth anything, I beat the game yesterday and didn't get anything. I was a bit bummed when I found out there wouldn't be any cheats from collecting the treasures like in the second game.