Ok, first off I will say that this is an extremely easy way to beat the campaign mission, especially on Legendary, (This is not how I finished it on Legendary, I only just figured this out).
When you first fly out of the Infinity in the pelican, Cortana will tell you to go to the two towers, then once you have done that you have to go to another tower to try and stop the Didact. Basically what this cheat allows you to do is skip the two towers.
Ignore Cortana and go to the 3rd tower and fly in to where it should open up. The platform will not have opened but the door will still open, even though you haven’t been to the other tower, go inside.
Congratulations, you have successfully skipped a huge portion of the level.
Edit: Just reposting something so everyone can see it on the front page.
If I had the tools to make a Youtube video I would buuuut I don’t. If anyone else wants to make a video on how to do this then go right ahead, just please mention that I am the one who figured this out (I don’t know of anyone else finding this before me, I figured this out on my own).
It is, just finished the mission on normal in the fastest time anyone has ever done it. My only regret is not finding this before I completed the campaign on legendary lol.
Wow I wish I’d heard of this earlier. I spent a long time grinding through that mission on my Legendary solo run. Seems like a big thing for them to miss, to be honest.