Missing Map in Halo 4

[Faisal Aslam]

I have played this game before and this map was present then. Don't know if an update broke it. I have tried validating all Halo MCC files but Steam does not seem to think that something is broken or missing. After destroying the second beam from mammoth, the next area becomes completely invisible. Mammoth is flying in the air as no map is loaded.

[countgrey]

That's a common glitch that dates back to the original games on XBox. Sometimes the Covenant Lich doesn't explode/despawn properly (I think it's not scripted to explode while you're on it, which in turn interferes with with the next area fully loading), and iirc they patched it so that the Mammoth eventually just travels ahead to the next area, which forces the next area to fully load.

What you have to do is after destroying the Covenant Lich, get on the Mammoth as soon as you can. The Mammoth will then carry you ahead to the next available mission area regardless of if the path has loaded or not. The next mission area is set up to block vehicle access anyway, so don't worry about having to give up your Warthog, Ghost, Wraith, etc, because you were going to lose it anyway.

Verifying/validating files won't fix anything, because it's a coding issue, not an update or missing file issue. It was patched years ago, and that patch was making the Mammoth travel to the next area even if the ground didn't properly load.

[StormDragonZero]

I had this happen when doing the Heroic Campaign Playlist of Halo 4 not too long ago. I spent too much time outside after destroying the Lich's core. It skipped a loading screen to simultaneously trigger the Lich's explosion and have Del Rio say some lines of dialogue. Things got out of sync and suddenly the area meant to load between Cortana's dialogue and the "sniper canyon" didn't load at all.

The simple answer is don't bother doing anything once the Lich is on the verge of exploding EXCEPT heading straight back to the Mammoth and just sit there for 5 minutes so things load as intended.