Recently, I created ten grandkidschildren in The Sims.

“Grandkids” kind of sounds like something an older person would say.

I’ve been playing The Sims a lot lately.

Okay, but how about: Recently I’ve been playing The Sims a lot.

I’m totally hooked—I basically see myself as’m like their god, creating their entire community.

Recently, I gave birth to ten grandkids in the Lu family (yes, I made it happen).

Sticking with the ‘god voice,’ you could say something like: Recently, I granted the Lu family ten grandchildren.

I’m totally hooked—I basically see myself as their god, creating their entire community.

Removing 'basically' makes you sound more confident and assertive in your writing, which might sound better if you are trying to emphasise your position, however, your sentence was still correct as is.

Recently, I gave birth tobrought ten grandkids into the Lu family in The Sims (yes, I made it happen).

Saying 'brought' instead of 'gave birth' clarifies the context a bit more, as well as specifying it was in The Sims, as as unlikely as it may be, someone may not understand and think you actually gave birth. However, your original sentence is still clear and understandable.