Ghosts are a feature of the Sims 4 Base Game. They are the result of Sims who've passed away, and their behavior and abilities vary based upon the cause of death. We have a separate guide to individual ways Sims can die, and preventing death. This guide to Ghosts will teach you about their attributes, means of getting rid of ghosts, having ghosts join your household, and how to bring a ghost back from the dead.

Ghost Visits & Basics
While there is some variation in what ghosts can do and how they behave, they also share the same qualities. Ghosts will visit in the middle of the night (after 10) and depart in the morning (around 6am). The presence of their urn (indoors) or tombstone (outdoors) is what determines the lot they will spawn on. Ghosts tend to behave erratically, but also in ways tied to the type of death they experienced. Having a haunting can be predictably chaotic, given the damage they could cause overnight, but they're mostly a minor nuisance that sometimes leads to funny moments and overall has a negligible impact on gameplay.

Ghosts may cause a Tense +2 Moodlet on Sims whenever they possess a nearby object, and possess the spook and pass through socials in order to scare Sims. Often, their arrival is nothing special to a group of Sims unless they possess a nearby object, and you're able to easily socialize with them and even befriend them over time. The color of a ghost shifts based on their emotions, not on their death type. You can easily tell if a ghost is happy if they're green. Flirty if pink, red is angry, blue sad, and so on.

Given the odds are somewhat low for a visit from an individual ghost each night, the more urns on your lot the more likely you are to experience paranormal activity. Players of multi-generational families who keep their previous Sims around may have 2-3 ghosts running around at night, messing with the house. I'd say a ghost appears on average 1-2 nights a week, sometimes more, and you may experience long dry spells with no activity.