A new Fallout: New Vegas mod turns every single NPC in the Obsidian Starfield release date.
Appropriately titled Nightmare Mode, this Fallout mod by PlatinumShadow comes with an ominous "happy Halloween" message, and a full, unnerving list of all its features. "In Nightmare mode," PlatinumShadow explains, "all NPCs and creatures are enemies. That means no doctors, no merchants, no factions, and no followers. To progress, you'll have to sneak or kill in order to scavenge and survive in a world where everything wants you dead."
The entirety of Fallout: New Vegas and its accompanying DLCs can be completed in Nightmare Mode, which means a select few characters, vital to story progression, will not be hostile. We've counted them. There are ten – ten NPCs, across the whole New Vegas oeuvre, that won't try to murder you on sight. Apart from that, you're on your own.
"As soon as character creation is finished, a message will notify you that Nightmare Mode is active, making (almost) all entities hostile by default," continues PlatinumShadow. "Anything that detects you will try to kill you so you'll have to scavenge enough ammo, medicine, and supplies to survive. Pair it with Hardcore Mode and your favourite difficulty overhauls for a truly brutal experience."
So, if you fancy the ultimate survival game, or maybe just want to find out what it would be like if absolutely everyone hated you, like roleplaying the writers of Game of Thrones season eight, you can Nightmare Mode from Nexus Mods right now.
Alternatively, you might want to try some of the other best Starfield cities, where hopefully the NPCs won't all be hostile murderers.