Aliens (music)

Aliens is the fourth track on the Halo 4: Original Soundtrack Volume 2.

Appearances
This soundtrack can be heard:
 * In Forerunner, when John-117 must shutdown the first pylon.
 * In Spartan Ops Episode 9 introduction cutscene, Key, when the Librarian's imprinted memories shows to Catherine Halsey the Janus Key.