Recently, the developers of the Fallout 76 shooter casually told that they were working on a new hardcore regime (at the request of the players). This dangerous mode is separated from the main game and has fewer restrictions regarding the experience of the player against the player (PVP). The "Survival" mode should be expected in the next update of the project.
in the new mode you can create a new hero or play already created. The principle of the regime is that you can kill everyone who moves (does not apply to a group or team). Any other players are marked as hostile - "saw - killed."
Details of the mode are described on the project page.