June 2020
@Nyerguds @EA_Cade In regards to your earlier question, for my issue it has been from the start on RA, however I did play through the Nod and GDI campaigns before beginning RA.
I had previously cleared out some saved games since the loading menu had gotten a little laggy. But this morning I backed up the folder where the remaster saves are stored, then deleted all but one of them to test and there's no change in regards to the issues. Even with only one save file in the folder, I'm still getting the install screen at startup and no options or mission completion is saved in RA.
June 2020
I have got the same issue (only RA, not TD), everything is gone despite save games. And I also played TD first and then RA.
Steam integrity check reports two files missing, but not which.