https://www.popularmechanics.com/science/a63237876/we-live-in-a-simulation/
It's odd that there wasn't an Ebenezer_Scrooge version of The Sims. Then he could have interacted with ghost sims.
https://www.carls-sims-4-guide.com/death/ghosts.php
https://sims.fandom.com/wiki/Ghost
https://matrix.fandom.com/wiki/Monsters