We had a question asked a few hours ago about the world of Fallout 3: Fallout - Vault 87.
I don't fully understand what happened with it, but it seems to have been migrated to Meta at one point.
This seems like a pretty clear case of asking about "Plot and characters in games". There's an aspect of the game world which doesn't make sense to the asker, from an in-universe perspective, and they want it explained. Seems pretty squarely on-topic.
Can we answer this? If we can't answer it here, for some reason, I'm certain we could answer it at Sci-Fi and Fantasy Stack Exchange. I'd probably answer it myself.