Soundtracks like these (with red banners) are not DLC. They are standalone apps and don't require ownership of the game. Whether or not Rockta is gifting it, or the game, I can't answer though. I want to make that distinction clear, just in case it wasn't already.

No reroll, please. The next winner will have the same problem. Simply mark this as Not Received unless the giveaway creator supplies a key for the correct game.