The sound design is exceptional

I play without music. And I must say, the sound design is one of the best I ever witnessed.
- The Necromancers (read this: https://www.pathofexile.com/forum/view-thread/34249/highlight/)
- The cave ambient sounds
- A dying tormented spirit
- Dying Fire Fury

and many more. It's all top notch and there are some highlights that can give you goosebumps.