Still not convinced about the impending awesomeness of Bungie’s Spartan swan-song? Try this new trailer on for size. It shows off snippets of the game’s Campaign mode with the trademark Halo choir emoting in the background. You can see snippets of the space battle sequence that we’ve covered previously and signs of a massive Covenant invasion on planet Reach. You’ll get to live out the last stand of the Spartans on September 14th.