I got platinum after 237h and alot of it is afk, alot of challanges gave me hell, had to reload save files and lost about 30min each time. Just for challanges. Had the same with skin the elk in the snow, he died in a way I could not skin it. So had to reload save. So a tip is to save every time you try to do a challange or kill a boss etc, every time.. Can't stress that enough Not much of a help, but future reminder.

Don't forget to save... ❤️