This is extremely unlikely to happen.
I am sure there is a backup.
I am sure there is a backup of the backup.
I am sure there is a backup that is stored far away from the other backups.

If a natural disaster occurred such that all backups were lost, I am also sure that we would not be able to play anymore.

But let's pretend hypothetically:
I would just start over again.
Although I may change the colour of my hair... maybe.