Fallout 4's new Survival Mode, which is still in Beta, is expected to bring an overhaul to the game's highest difficulty level to include new features like disease and other challenges, as well as make changes to how you play the whole game including food, sleep, danger and much more.
Fallout 4 Survival Mode Beta will be released next week on Steam. Once the mode exits beta stages, it should be launching first on computers and then on current-gen consoles later on.
BethesdaStudios