Re: Sims 4 alphabet legacy trophy
@JamesBlock1996 I don't know if the achievement uses family tree, but the achievement text says single household. So that means one single household for 10/26 generations to me.
So if you have moved everyone out of the original household then each new household would start a new counter, possibly.
I can't tell you if the way you are doing it will work for achievements, as you've made new households to play and left the original household to die off.
It would be nice to know if moving the children out and playing them in a new household would work for the achievement. The way the achievement text is worded makes me think it may not, but I can't say for certain. I couldn't find any other posts in my searches that said they did the achievement the way you are.
You can always test it out if you are playing with aging off or something by having your 10th in game born gen born both in their own household and moving them back in to the original household (save before labor) and see if the achievement pops up either way.