Woot

I did a l4d2 Speed run with this

Interesting

The fact that you had table of conents is definitely a plus. Your beginning was somewhat bland, instantly seems as if it's going to be another chopped up metal song. The rest that followed was a great set-up for the later introductions to more pieces of the music/story. The section that holds the SFX guys was, as said below me, a great build on each other, but it needs something at the sudden break-off point at 2:14. Come in heavier, harder and louder with more abrasive guitar chords. Having said that, have it fade out to the original music that holds the main spot within a few seconds to save the feel around the after effects of being surprised. Maybe that's what you wanted to make us experience at that point, but I just wasn't getting it. It felt weak. I wanted to feel what they were feeling. It was a great peice, and I hope to hear the new/modified version of this in the future! Keep up the good work.

Really Cool

The idea is great and the execution is excellent. I especially like the zoom SFX and how it builds on the beat. The only improvement I can think of is maybe slipping some ambient backgrounds below the song.