It's from reference to what Bungie once was. All the way back to their Marathon games. Look it up. The medal in the game and the games cover art have the same logo. It's been a running thing with Bungie. It's kind of a way to give props to the older fans. Hope this helped. [spoiler]In case you are talking about the medal instead, it is 7 rapid kills. That means you have to kill the entire team in a 6v6 Playlist and then kill one as soon as he spawns.[/spoiler]