So I was doing patrol missions with a fellow guardian when all of a sudden my ghost started rambling on about a secret message. It popped up a patrol mission type deal but the details were all question marks. I started killing dregs and vandals and the diamond started filling and letters started to fill in the question marks. After that was done another question mark challenge appeared and it involved dancing a bunch. I think it decrypted to Dance Floor Masters. The third was to get headshots. After all this I got a minimal amount of rep and a couple strange coins. Anyone know how this triggered??