The Sims 4: 10 Expansion Packs Fans Demand
9. Apocalypse Expansion Pack
With an Apocalypse Expansion Pack, zombies would take over the Sim world and other Sims need to learn how to defeat them and survive a post-apocalyptic world.
In the Apocalypse Expansion Pack you'd be asked whether you'd like to play as a Zombie Sim or a regular Sim. Of course, your Sim could be turned once bitten as well.
If you play as a regular Sim you'd be hiding out in broken buildings, risking your life to get food in old supermarkets, outsmarting zombies and fighting other regular Sims for a hot shower (because water would be scarce) and if you play as a Zombie Sim, you'd be fighting to feed off of regular Sims for nourishment, catching them when they try to outsmart you and use food in supermarkets as bait to lure unsuspecting Sims.
It would probably be a bit gory for young Sims players, so an R-Rated Apocalypse Pack could really work for older players.