For me it's Star Fox 64.
I would lose my s*** if that game got remastered for the switch. I know this sounds crazy but it's still just as f***ing good now as it was when I was a kid. Perfection, 10/10
mass effect trilogy
all dlcs, remastered graphics, same combat, play it without interruption between games
its legit a crime this hasnt happened yet
mgs 1-4