In Fallout Shelter you're able to make babies when you assign a male and female dweller to a residential area. When the babies are born, what determines the SPECIAL stats? It seems to be somewhat influenced by their parents, but there seem to be other variables. I want to breed children with high SPECIAL scores.

  • Mh, I'm not quite sure. I have to parents with high S stats. The child was born and have a quite low S value and a middle P value. Not sure if there is any influence or just random.
    – Ionic
    Commented Jun 17, 2015 at 13:17
  • At this point I'm pretty sure it's totally random. I have mated most of my women with my "Stud", a high level and high attribute dweller. I have also mated a few "normal" couples together, people of low level and normal attributes. I have yet to notice any appreciable difference in the SPECIAL attributes of any of the kids. They all seem to come out with the normal 1 - 2 in most attributes with the occasional 3. Never anything more, sadly. :(
    Commented Jun 20, 2015 at 14:08
  • Have a look at this question gaming.stackexchange.com/questions/237881/…
    – Marcus D
    Commented Oct 13, 2016 at 9:12

2 Answers 2


The highest average stat between the two parents determines what the child's highest stat will be. However, it only decides what the highest stat will be, not the value of that stat.

  • 1
    +1, this seems to correlate my own experience. I've yet to record a child who was born with more than a 3 special score, so it's possible that is the max.
    – two bugs
    Commented Jun 24, 2015 at 14:12
  • 14
    That's a shame, I had imageined myself doing a long term Eugenics program to create the new super species of dwellers. :) Commented Aug 18, 2015 at 14:44
  • 6
    Do you have a source for this? It directly contradicts another answer.
    – Daenyth
    Commented Aug 21, 2015 at 19:30

The SPECIAL stats are randomly generated for each dweller. You can upgrade their SPECIAL stats though with these rooms:

  • Classroom - Intelligence
  • Armory - Perception
  • Weight Room - Strength
  • Athletics Room - Agility
  • Fitness Room - Endurance
  • Lounge - Charisma
  • Game Room - Luck
  • 8
    Do you have a source for this? It directly contradicts another answer.
    – Daenyth
    Commented Aug 21, 2015 at 19:30
  • 2
    I believe this is so because I had a dweller with high intelligence and he has a child with someone with good intelligence as well. The child they have has a rather low intelligence. It was actually their lowest skill.
    – Thom
    Commented Aug 21, 2015 at 20:21

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