Legendary Guide:
So this is known to many as the hardest mission in the entire Halo Franchise, and having played all the Halo games on legendary I'll have to agree that it is aswell. It's very long (took me 2 hours 15) and very hard in most of the areas that you can't skip. As you can see from the video below the World Record fastest time is nearly 18 minutes which is incredibly long for speedrunners. Use the video below to see when you can run past enemies and skip areas or for guides on where to go for fights etc, good luck!