>>382465993
The only hint is [spoiler]a note at the castle in 2.0 saying someone thinks something is about to happen there. Nothing else about it. Then again in 2.0 the castle is right under the radius like how it is in the mine in 1.0. Not so much a retcon as it is just left out. Pretty sure in a roadside picnic there's no mention of how or why it happened either.[/spoiler]