Intro Movie-A dark screen slowly starts showing (while playing epic music that would be used in dramatic movies) illiterate text that slowly transforms into proper english in the form of the Halo text font.  The text reads:

Billions have been lost.....

Death sweeps the Universe like a hurricane......

Battles have exploded, between that of man, that of alien, and that of...........

..............something else

But now.........

That what was once man vs. alien will become the last and only defense............

Against the parasite............

And the sacred rings..................

The greatest war to have ever surfaced comes to an end here.

The screen goes black again and slowly shows Earth, constantly being attacked by Covenant ships and shows the Forerunner ship with the Master Chief and the Prophet of Truth on board closing in on Earth's position.   The screen backs away from Earth slowly and faintly reveals a single Halo ring surrounding Earth as the game's logo faintly appears in front of Earth and plays a new mix of the Halo theme and then moves to the main menu.