We are actively investigating issues impacting players' ability to sign in to Destiny on all platforms. Until resolved, players may experience disconnects or be unable to sign in.
No matter what ever way you look at the game, Destiny is a MMO. Is it Massive? Yes, there are tons of people in the hub and in the events. Is it Multiplayer? Yes, that should be a no brainer. Is it Online? Yes, it forces you to be on the internet just like a normal MMO. So why do I see people calling it a "Shared World Shooter"?