Bethesda have confirmed that this info is legit and pointed to it in a tweet of their own. Bethesda mentioned working on a mode like this for Fallout 4 a couple of weeks ago on Twitter, and now a Reddit user named /u/ShaneD53 has unearthed some details of how it will work. This mode made it so you had manage things like hunger and thirst, while making small adjustments to make the game a bit tougher. When Fallout 4 released, one of the omissions was the lack of a 'Hardcore Mode' like the one seen in Fallout: New Vegas.
