I remembered something in regards to my playthrough that had multiple abductions. I created a scientist and alien in Strangerville. The role play idea was that the Alien and Scientist are rivals and Strangerville was another mystery or natural wonder waiting to be solved. I'm wondering if having an Alien living on a lot in one of the worlds had an impact on households in other worlds.
I also remembered after typing what I remembered that my sim ran a store for a short period of time, and I found out that I hired an Alien when I went to design their employee uniform.
To my knowledge, most of the Aliens are NPCs that are homeless. Maybe there's a trigger that comes with having an alien household in the game. Or, maybe it happened because I hired an Alien as an employee. It's difficult to keep these things straight considering that I have restarted after a new expansion pack. The Aliens could be similar to Merfolk where a household needs to be awakened to their presence to notice them and experience abductions. I know, for merfolk, the "Ordinary" Conch collectible is the easiest way to awaken a household to the existence of merfolk. Maybe, there's something in the Get to Work Pack that has a similar function. The scientist career and doctor career have ways to either reach out to aliens or reveal their existence. (Satellite Dish and Wormhole Generators for the Scientist, X-Rays for the Doctor, and maybe hiring an Alien to work in your retail store idk). I wonder if the chance of getting alien pregnancy is increased after you awaken the household.
Anyways, if someone is trying to trigger abductions, I hope this info helps. I certainly didn't know how different actions would affect the gameplay.
