One idea could be a story about a lone wanderer who discovers a hidden vault that was never part of the original vault - Tec plan. They find it filled with advanced technology that could change the wasteland. Another could be a fanfiction where a group of settlers tries to build a new civilization based on pre - war values in the middle of the irradiated chaos. And also, a story about a mutant who has the ability to communicate with the mutated creatures and tries to broker peace between them and the humans.
Well, you could write a fanfiction where a character from a different game or universe gets dropped into the Fallout system. For example, a character from a medieval - themed game suddenly finds themselves in the post - apocalyptic Fallout world. They have to use their unique skills, like sword - fighting, to survive. Or perhaps a story about a Brotherhood of Steel member who discovers a long - lost faction that has a different view on technology. They then have to decide whether to side with them or stay true to the Brotherhood's principles. A third idea could be a fanfiction centered around a caravan trader who stumbles upon a secret stash of pre - war medicine and has to fight off various raiders and factions who want it for themselves.
A plot could involve a group of settlers from Fallout 3 trying to make a new start in the Mojave. They run into trouble with the various factions in New Vegas. Meanwhile, a character from New Vegas goes to the Capital Wasteland to learn about their different ways of survival. This leads to an exchange of ideas and technology between the two groups, as well as some clashes due to different values.
One idea could be a story where the survivors of the Fallout world discover ancient Valyrian steel weapons and try to figure out how to use them. Maybe they think the weapons have some sort of magical power that could help them in their post - apocalyptic struggles.
One idea could be that the Dragonborn from Skyrim somehow gets transported to the post - apocalyptic world of Fallout 4. Maybe they have to deal with the new threats like the raiders and mutants using their dragon - slaying skills. Another plot could involve the Sole Survivor from Fallout 4 finding a way into Skyrim and getting caught up in the civil war there, having to choose a side while also trying to find a way back home. Or perhaps a magical artifact from Skyrim ends up in Fallout 4 and causes all kinds of chaos as different factions fight over it.
One idea could be about a character from Fallout ending up in the Star Wars universe and having to adapt to the use of the Force. Maybe they try to use their Fallout - style skills to survive in a galaxy far, far away.
One idea could be a character from Fallout finding themselves in Skyrim. Maybe they bring their advanced weaponry, like a laser pistol, into Skyrim's medieval - like world. This would cause quite a stir among the locals, who have never seen such technology. The character could then get involved in Skyrim's political intrigue, using their unique skills to help or hinder different factions. Another plot could involve a Skyrim mage traveling to the Fallout wasteland. They would be amazed by the strange, post - apocalyptic magic (technology) there and try to learn about it, while also using their own magic to survive against the mutated creatures.
Another interesting plot could involve a female deathclaw being an outcast among her own kind. In the fanfiction, she could be more intelligent and empathetic than the other deathclaws. She decides to seek out the source of some strange occurrences in the wasteland that are affecting both humans and deathclaws. Along the way, she teams up with a group of survivors who are initially afraid of her but soon learn to trust her.
A plot could involve Cass's pregnancy being a symbol of hope in the Fallout wasteland. She might decide to start a community initiative for better living conditions for the upcoming baby. For example, she could try to clean up and secure an area for a future settlement. This would also show her determination and strength during pregnancy.
Perhaps a plot where Piper tries to start her own newspaper in a different settlement. She faces many challenges like getting paper, finding trustworthy reporters, and dealing with the local politics. Along the way, she might uncover some secrets about the settlement that the local leaders don't want to be made public. This could lead to a conflict between her journalistic integrity and the safety of the settlement.
One idea could be a character from the Enclave finding themselves in a situation where they have to team up with a group from the Fallout world they usually oppose. Maybe a lone Enclave soldier gets separated from his unit and is forced to rely on a group of wastelanders to survive. This could lead to a lot of character development as he sees a different side of the world outside the Enclave's ideology.
One plot idea could be a team of RWBY characters getting teleported into the Fallout New Vegas wasteland. They'd have to adapt to the harsh environment, deal with radiation, and face off against the various factions in the game. Another could be a character from Fallout New Vegas traveling to the RWBY world and learning about the concept of Dust and Huntsmen.