Hi. I have a question regarding the game mode. Is it possible to unlock it using saves or some other way? Or do I have to complete the game the first time? (I haven't completed the second part and it would be more logical for me to complete the game normally myself first, but I'm just curious)

it would be possible to unlock it using saves if you manage to find one on the internet, but if not, you just have to finish the game once on any difficulty