Game is broken black screen and unloadable

Everything is gone. And I'm so furious and disappointed.

I have recently finished Lucanis' companion quests Murder of crows. I did the cut scene, then went to arlathan forest to do darvin and bells companion quests.

As soon as I get to the forest, it's missing most of the ground. I can't run out of the beginning area with out falling through the world and then met with a black screen and the UI is still there. Fast traveling any where in the area also has be just have a black screen and I see rook fall through the world for a second then dies, and loads back in a black screen with the ui still available.

I tried continuing the main quest line "blood of Arlathan"". It's also in arlathan forest. This area is also filled with holes and I can't move on or I fall through the world.

I tried going back to an old save file and playing to that point again. But you still fall through the world.

I tried going to dock town, just to see if it was only arlathan. Turns out dock town doesn't have a ground either.

I restarted my Xbox, and the game just won't load anymore. It just opens a black screen and there is nothing there.

The game is completely broken.

So now dragon age is simply unplayable.