i would call it Fallout: london or something.
it should be set in london as you travel through the wastes of the whole city.
the game would start out with u and your girl on top of the big ferris wheel but u 2 are the only ones on it besides the operator.
u hear the sirens and you 2 and the operator get off and run for the nearest vault in an underground parking lot. as you hear the booms of the bombs go off u get into the vault and it closes. you can hear your girlfriend and the operator scream to you to find them. then the screams stop. years later you escape and go in search for them finding new weapons and armor and odd creatures. as well as survivors making new colonies and other vaults that didnt do so well or are doing better.
please respond and tell me what you think.