[Apocryphon]

You might appreciate the seminal amateur work on that subject, 1983: Doomsday

https://althistory.fandom.com/wiki/1983:_Doomsday

It's one of the most massive collaborative world-building projects of its kind.

[arethuza]

If by "appreciate" you mean "work out how quickly I die in that scenario" then yes :-)

[26th September 1983 was not long after my 18th birthday and a few days before I started a course at a university in the centre of Edinburgh].