Yo dude, old or not, this looks cool. I know you said you're not gonna finish it, but you should give it a shot. In your free time 'n all. Cuz this can become a banger of a mod if you ever release it!
I honestly wish what they did for this game was make it so the surface is basically destroyed and completely uninhabitable, but the sewers and metros remained connected and are capable of being inhabited.
Fallout was never really about this. It started off as a game about massive Californian nuclear desert, so putting it strictly underground would take away a massive chunk of it's appeal. If you like subway tunnels and stuff, play Fallout 3 if you haven't already, plenty of that in there and the atmopshere is among the best games I played. Or Metro, as guy above me said, the plot is literally the way you described it
It looks like the Electricity that jumps off the generators in Vault 111, So it may look cool now, but would become very obnoxious how square it looks xD
In fallout 4? I don't think so unless its modded, it might be a very rare spawn but i never found one. This one was made using console commands... In fallout 76, they are all gone as far as i know now
Okay, this might be the most powerful weapon in the game. I have an explosive assault rifle and two-shot assault and I always thought the explosive assault was the most powerful, but now I gotta find out which is the winner. hehe