From Sims Online:
How to finish the storyline with cheats
If you’re stuck on the storyline we’ve wrote a guide that will be very helpful if you want to finish the story yourself. If you just want to play in the new world without infected/possessed Sims, you can use these cheats. First install a simple mod. This will unlock new cheats you can use in The Sims 4.
Install the mod
Step 1 – Download the Tmex-AllCheats.ts4script (found on the bottom op the page)
Step 2 – Place it in Documents > Electronic Arts > The Sims 4 > Mods
Step 3 – Enable mods in you game options (Gameplay options > Other, and check both the “Enable Mods” and ” Enable Script Mods” options)
Step 4 – Restart your game (If the mod is loaded properly a popup will confirm it was loaded.)
Step 5 – You can now use every cheat from this page!
Change, skip or finish the complete storyline of The Sims 4 StrangerVille
In order for it to work you’ll need to install the mod mentioned above. Place your Sim at the location of the Secret Lab. The environment will change after you entered the cheats. You can also activate the cheats on another lot but you’ll need to travel first in order for it to work.
Cheat Code Result
narrative.start_narrative narrative_Strangetown_Act1 This is Part 1 of the story (when you first enter the world)
narrative.start_narrative narrative_Strangetown_Act2 Unlock Part 2 of the story (this will change the environment)
narrative.start_narrative narrative_Strangetown_Act3 Unlock Part 3 of the story (this will change the environment)
narrative.start_narrative narrative_Strangetown_Act4 This will finish the storyline and removes all infected/possessed buffs from townies.
More info here:
https://sims-online.com/sims-4-strangerville-cheats-complete-storyline/
