Palace Of The Dead SOLO: Changes Needed

[Azuri]

Maybe a better way to ask the question is:
If I solo from 1-200 and don't die at all, do I get all the achievements (solo to 50, solo to 100, solo to 200)?

Yes. You get the respective achievement for recording a score at floor X or above. And to record a score you have to end a run either through dying or reaching floor 200.