.@LeFrenchSimmer To start off, aliens aren't covered under the population options introduced in Supernatural because they will never live in your world without you inviting them to. Occasionally you'll see aliens visit your world during the night; they choose different areas of the neighborhood to explore and gather data from... they might even come to your home, but they won't disturb your Sims, enter your home, or mess with anything on your lot. On the rare chance that your Sim gets abducted by an alien, they'll be transported in the UFO for a short period of time before being returned to you. Hope that info helps! RT @LeFrenchSimmer @SimGuruGraham For those of us rare players who don't want aliens in our game will there be a way to prevent them from appearing?