Game Wont Start After Def Rebuild

[MDT]

I cant get my game to start after rebuilding the def, I have cleared the chunk0, updated index and nothing? stuck on infinite white screen. 

I have the steam version and I am at a total loss.

[Cave Waverider]

What did you rebuild the .def file with? If you haven't already, try using CCT 2018's .def regenerator.

That said, being "stuck" at a white screen could mean the game is still loading. Depending on how slow the HDD you have the game installed on and your OS' temp folder is, how little RAM your computer has and how slow in general it is, the game can take a very long time with an empty Chunk0.arc file. Try to start it and wait half an hour or so and see if it eventually finishes loading.