Hi,
I just bought the 25th anniversary edition yesterday and at first it worked fine and I also could save the game. Now I went to the screen with the guy who sells trash for 1 gold each. I wanted to save there but it didn't work and when I try to get back to the game I get a black screen. I tried it yesterday and a second time today, both times the same problem. So the game is unplayable except you want to play it in one go without saving.^^. That needs to be patched asap. You could have made the Remaster a bit more expensive but also with more care.