After creating Halo Bungie didn't just sit around twiddling their thumbs wondering what to do next. Well, they might have done that for a little bit - but they are bringing us a new Destiny. You see what I did there? I plugged the game title into that line, in case you didn't notice.
In Destiny you are a Guardian of the last city on Earth and to protect is you will travel across the solar system, doing whatever is necessary. As a Guardian you have an immense power that will be utilized against your enemies to reclaim what was lost during the fall of the 'Golden Age.'
Destiny interweaves multiplayer and singe-player, in fact, the game might be more fun if you play it with someone else. Without further ado, here is some gameplay from E3.