lovisa olsson

Hi, I realized that since I’ve come so far in the game that the trains are unavailable I can’t do the challanges or accomplishments involving trains, since I’ve missed them, meaning I can’t get a 100% when finishing the game, which is the thing I’m aiming for. So I was wondering if I go back to one of my older savings, that’s before the trains get unavailable, and do the things that involves trains, will those things be saved when I go back to my “real” saving? Or what should I do? I really want to finish the game at a 100%.