one of the coolest things about the bonehoard is the horn of quintus which has persistent howl that permeates the entire lower caverns soundscape. As you get closer to it, the noise becomes more noticeable until you're finally in the chamber and its at its full howl. Once you grab it you're bound to notice the room goes silent but what you may not notice so bluntly is the change in the lower bonehoard's lower half, the entire soundscape has changed. It's a great game and really makes me miss a time where western developers put in a lot of effort and little details in their level designs.

Deus Ex is nice but there's really no comparison to Thief.