Fallout 4 Survival Mode brings some new difficulties such as:
- Survival adds additional challenges including no fast travel, saving only when you sleep, increased lethality, diseases, fatigue, danger and more
- Characters set to Survival difficulty appear under their own Character Selection filter
- Survival difficulty characters are not backward compatible with the 1.4 version of Fallout 4. If you opt out of the Beta, do not use Survival character saved games
- Log into Steam
- Right Click on Fallout 4 in your Library
- Select Settings and then hit Betas
- A drop down menu will appear, select Survival Beta Update and then OK
- Wait a few minutes and Fallout 4 should update
- When done, Fallout 4 should appear as Fallout 4 [Beta] in your Library
Steam