???

It might be kind of interesting to play a game where quickloading was allowed to undo decisions you've made, but it starts gradually making the gameworld more and more unstable, and your avatar slowly starts to remember the actions he's undone and has a hard time reconciling them with the current reality until he just goes completely insane and the player slowly loses control of the protagonist, as the protagonist rejects the player's intrusion on his life. It might not go over well with players though.