Why do a remaster? They only need few backports of those features - Early Access version 29 - #37 by InterAction_studios
What? Absolutely not true.
You can backup save files.
This won’t happen because IA fcked save files and they work bizarrely
Now, every problem mentioned would be solved if the episodes were remade in CIU. You can read more here: Chicken Invaders Universe episodes DLCs framework