What is the song from the F.E.A.R. video game commercial?

The song is Mad World by Michael Andrews. You can go to Lyrics.net to see the Words and make sure this is the song you are looking for.

Wrong, that's the song for Gears of War

It is a Marliyn Manson song from his album "The High End of Low." The name of the song is "Four Rusted Horses."