COD MW2 "Main Titles" by Hans Zimmer

World War Z-Theme Song.

Tracks in Dream is Collapsing (Extended) - Hans Zimmer

1- Dream is Collapsing
2-Waiting for a train

Like for more:Inception 

A cover for Malukah's version.
Instrumental track- by Andrea Verzulli: https://www.youtube.com/watch?v=HWI5HCpWiv8
