some random person (could literally be anyone, it could be Barack Hussein Obama or a SI) gets put in a forest or like a frozen desert (think south pole) and has to survive and get stronger or something ( you can make up more goals if you want just please try to keep these ones around.) The MC could earn things like tools, weapons, food, textiles, and knowledge (mainly on how to survive) by temporarily taking over the body of someone who after their death wanted to change what happened surrounding their and going back in time to a certain amount of time before their death and changing how they died to something that they would like more (reward depends on how much they like the end result.) example: The MC takes over the body of a peasant or mercenary or knight who died participating in a seige on a castle or city and have to change it so he survived the fight and died saving a child from drowning.
You could add more since you would be the one writing but please stick to these general themes because it's something I would be very interested in reading.
The reason I don't write these myself is that I'm really bad at writing stories fast and end up spending WAY too much time making sure every single small unimportant or undetetable detail is 100% spot on and everything's perfect.