Hi dreadbalthazar!
Sounds very basic, but did you tried to clean your xbox lense? If you have the same issue with a different disc, it can't be related to the DvD of DSIII.
I had an issue last year with an misaligned Xbox leanse, their techsupport re-aligned the leanse and it worked fine then. I had only issues with newer games.
Anyway, let's see if some gamedata are corrupt.
To get sure that no corrupt data causing your issue, you should clear your cache:
- From the dashboard, click on My Xbox.
- Select System Settings.
- Select Storage.
- Highlight Hard Drive Device.
- Press Y to select Device Options, then Clear System Cache.
- Reboot your console.
Redownload the updates for the game. NOTE: Not all games have a Title Update File.
- From the Dashboard, click on My Xbox.
- Select System Settings.
- Select Storage.
- Select Hard Drive Device by pressing A.
- Select Games and Apps.
- Select Game Title.
- Delete Title Update File.
- Restart Game.
- Download the update when prompted.
Please keep us updated!
Basti