This song was in a Gears commercial where marcus and dom are going into the dark tunnles to fight the monsters. It starts with Marcus sitting by a tree and dom holding a picture of his missing wife. Then they show a sniper looking through a scope, and he sees a flower in the wasteland. It ends with Marcus and Dom opening the door to the darkness.
When I heard this when I was watching a trailer for Gears Of War and it seems to fit it well. Because what they were going through and see if they can end this war they are having, plus what was happening to Dom family...it was sad..still have the trailer on my Xbox 360, watch it when I feel sad.