So something like 5 years ago, Marty O'Donnell (composer of the Halo soundtracks) created what was supposed to be a musical prelude to the game Destiny. It was supposed to be Marty's magnum opus. Due to some legal issues (primarily Marty getting fired), it was never released to the public. Apparently, Marty had distributed ~100 copies to friends/family, and one of them leaked it.
I don't care if you don't like Destiny, or don't play video games at all. This is a masterful piece of music. It's really a stellar piece of work, and deserves to be shared.