It's been 7 years since the last Fallout game, so one gamer took matters into their own hands and made an entire vault in the Sims

Building a better future underground.
VG247

The Sims 4 Lost Legacies Event Guide: What it is, how can you take part, and what are the rewards?

All of your Lost Legacies FAQs answered, including how to take part, the event duration, quest list and rewards!