[Blue Highway]

I just looked it up and from my first search it says Sims4.

https://www.carls-sims-4-guide.com/lifestates/aliens.php#:~:text=In order to have a baby with alien,also invite Aliens to move in%2C of course.

[This_Dude]

Ok. I remember sims 2 having aliens in it but that was a lot of years ago