The Sims 4 StrangerVille Mystery Aspiration
Story Ending: Vaccines & Source of the Infection The Mother Plant
The Mother Plant is nasty and requires a team of Vaccinated Sims to fight and finish the StrangerVille Story.
Having entered the Secret Lab's basement, we have now found the massive Mother Plant, the source of the infection. She's causing all this strangeness and we need to prepare for a confrontation by doing a little science. Bring your Infection Scanner, as you're going to need it.
Develop a Test Vaccine
You'll spend a while getting the many Spore Clusters you need, but the state of the world makes it easier. Again, stick to the lab for gathering these.
In order to make a vaccine we can test, we are going to need 5 Spore Clusters and 1 Bizarre Fruit. Each, and we'll need at least 6 or 7 of them. I did 15 spores to start and 15 later. You should already be good at this if you read Part 3, but I'll repeat it for people who did it out in the world - scan for Spore Clusters in the Secret Lab, it's highly effective and you'll get 5 each time. After the first round of 15, work on getting the second component (the fruit) while the battery on the Infection Scanner recharges.
You'll finish the story if you can stop the infection. StrangerVille is in a bad state with many plants all over, so getting Bizarre Fruit you need for the Mother Plant Battle will not be very hard.
You will also need 3 of the Bizarre Fruit for now, which come from the odd plants all over town. When you walk up to one and click it, you get the Nurture option if it's ready. This will cause the plant to bloom and yield a Bizarre Fruit each time. You'll need to find 3 plants for this step, as they only yield 1 fruit.
Vaccines are required in order to fight the Mother Plant
Take your 15 Spores and 3 Bizarre Fruit to the Chemical Analyzer in the Secret Lab and pick up some others after your scanner recharges. You'll want full energy to give you enough time to make 3 Test Vaccines. This is ultimately saving time vs making multiple trips, but you do it however you feel comfortable.
Testing the Vaccine
We can now make Test Vaccines at the Chemical Analyzer in the Secret Lab's Basement. Make a total of 3 and you can begin testing them. Head out to town and look for Sims who are obviously infected and under the Mother's influence. The Vaccine probably won't work at first, but you can learn a bit from it. When you have tested it on 3 Sims, you should finally have enough data.
Use the actual, working vaccines on the friends you'd like to bring along to fight the Mother Plant.
Once you've tested the 3 vaccines, you should get a notification that it now works and you are able to produce a true cure to the StrangerVille 'virus'. While you can choose to leave the world this way and vaccinate Sims you like, you should probably move on. The game gives you options to set the Strangeness however you like, even with the story completed.
Recruiting Sims To Fight Mother
Now you need 3 vaccinated friends who you will also recruit to fight mother. Find a Sim, vaccinate them, then get them to join you. They need to be vaccinated to be able to go. If a Sim is a local, it is much easier to get them to join. If the Sim's from out of town you'll need to take them to StrangerVille and get them to at least 30% friendship before you can ask them to fight Mother. They'll tell you this world's problems are not their own.
Fighting The Mother Plant
Vaccinate, then recruit to assemble your group of Sims to fight the Mother Plant in StrangerVille's Secret Lab
With 3 recruits you are now ready to fight Mother. Head to the lowest level of the lab, using Travel With that comes up when you use the map. The three Sims don't have to be nearby but they may join the fight a tad sooner if you use group move and make sure they are following you to the bottom. Otherwise they seem to attempt to teleport so they are in the right place. When you get to the last door and walk up to Mother, you'll get to choose 'Fight With' and pick all three of your allies.
The Motherplant battle is very unique and offers some unexpected fun. I enjoyed fighting her and many of you will, too. Be sure to read what is after the fight for some advice on dealing with her later as you are not exactly killing her but getting her to cut the crap.
The Mother Plant battle may be foreign to a lot of Sims players. This fight is kind of like an isometric RPG with real-time combat. Your Sims will deal damage to her while she deals infection to you. The player has an infection meter which must not reach full, while the Mother Plant has health that must be brought down to 0. Clicking allies, you can issue them commands and clicking the Mother Plant issues group commands or those for your own Sim. You have a lot of options for how you approach this fight. Will you have each of them fight one of the zombies that comes to attack, or stave them off with a Warbling Warcry (scares Zombies). Only the absolutely wrong decision will wreck your day (ie, doing something that increases damage but also infection when you are nearing full infection).
Allies can be ordered to 'Throw Infection Vaccine' which deals big damage to the Mother Plant (about 8% of her health).
Click the Mother Plant herself to get a menu that lets you choose Group Commands and use abilities with your own Sim. These change how much damage/infection you take or deal direct damage. Here's a list:
- Throw Infection Vaccine - Does the same as when an Ally throws one, as far as I can tell.
- Retreat! - Your allies take more damage, but so too does the Mother Plant.
- Mega Spray - Deals damage similar to throwing an Infection Vaccine, 90 min cooldown.
- Be Careful - You and Allies take less infection but also deal less damage to the Mother Plant. Useful for allowing for cooldowns on more powerful abilities to be used to bring her down instead of automatic damage.
- Charge! - Your allies take more damage, but so too does the Mother Plant.
- Take a Breather - Allows your Sims to recover from infection while taking no damage. Use this just after firing off all your other cooldown attacks like Infection Vaccines and it may be the only tactic you need!
- Warbling War Cry - repels the Mother Plant's Zombies
The Mother is finished, and so is the story.
In general I didn't find much use in fighting Zombies but it very much depends on some randomness. I think they tie up your Allies while fighting but need to do the fight over a few more times. All in all get some damage in while minding your infection meter, using up your allies' infection vaccine cooldowns, and when around 40-50% infection level use Take a Breather. Depending how the fight is going you may want to switch to either Charge to finish her off, or Be Careful to make more use of your cooldown attacks.
A Mother Plant Friend
You can make the Mother Plant your friend
When you've beaten the Mother Plant, you're the Hero of Strangerville (reward trait) and will get cupcakes and mail from fans. Though you also get a few socials to retell the story of your heroics it's a fairly weak reward as it does not give Fame from Get Famous. However there is another reward hidden here.
Revive the Mother Plant with a Bizarre Fruit and you can begin to talk to her. Build up your friendship, which takes several hours at minimum, and the Mother Plant will start offering you things once you're in the green. At greater than 50% friendship she offers you four abilities, which all have a 24 hour cooldown. You can request energy, career success, riches, or life extension. The Mother Plant has her own page, which lists the benefits of her gifts.
StrangerVille Game Pack Guide
StrangerVille Town Guide
StrangerVille Mystery Guide Act 1: Getting Started in a Strange Town
StrangerVille Mystery Guide Act 2: Evidence, The Dossier, and Key Card
StrangerVille Mystery Guide Act 3: Hazmat Suit, Spores and Spore Filter
StrangerVille Mystery Guide Act 4: Source of The Infection (Spoilers)
Story Guide (Spoilers) - Learn Things You May Have Missed - New
Source of the Infection
Sims 4 StrangerVille Mystery Guide Part 1 (Video)
Sims 4 StrangerVille Mystery Part 2 (Video) Ending the Source and Rewards
Cheats for StrangerVille
Check Out My Youtube Channel!
We now have a Youtube Channel with over 50 guides in video format to go along with the huge site I've already created. Check it out and consider subscribing if you like my style.
Share Tips and FAQs (1)
Our Sims 4 Community is the place to go for faster answers to questions and discussions about the game. Use the form below to share your own experiences and provide helpful tips to other readers. We are not affiliated with EA and cannot make changes to the game, nor fix bugs.
Sims 4 Packs & DLC
New Videos and Guides
Armageddon Mod (Mod/CC Reviews).
Latest in The New How To Section : Learn How to Write Songs and Make Money with Music in The Sims 4. Also, How to Get Abducted by Aliens. We have a guide for using Pregnancy Cheats, Get a Job, Adopting a Kid and How to Cheat.
Alien Abduction: I made a Video Guide to Alien Abductions, Alien Babies in The Sims 4 Get to Work.
New How To Section : The new How To's section is updated with How to Get Abducted by Aliens. You can also learn how to use Pregnancy Cheats, Get a Job, Adopting a Kid and How to Cheat. It's meant to help newcomers or those with specific problems and will be greatly expanded over coming months.
Seasons and Guide Updates
We now have a Videos page, where I'll list every submission to our Sims 4 Gameplay Guides Channel. I'm taking feedback seriously, improving recording and sound quality and other issues with my video guides. Let me know what you think and subscribe for more like it. If you comment on the videos page with a request I may bump it higher on my to do list (no promises though!). Here is a listing of all videos released to date, in order of release:
Sims 4 February Patch Summary
Get Famous: Celestial Crystal Crown
Visit My Channel to Subscribe!
Get Famous First Impressions
First Person Mode (Sims 4 Update)
Get Famous Acting Livestream
Livestream Summary (Latest Patch News)
Patch News: COMING SOON
The Sims 4 Get Famous Expansion
Archaeology Guide (Jungle Adventure)
Jungle Adventure Gameplay
Nerd Brain and Computer Whiz
Spa Day Review and Gameplay Guide
The Sims 4 Whims & How to Use Them
Ambrosia Ingredients and Raising the Dead
The Sims 4: Making a Super Sim
The Sims 4 Careers (Improved)
Seasons Holiday Decorations Guide
Cool Kitchen Stuff
How to Woohoo & Try for Baby
Playing a Moocher
Sims 4 Writing Skill
Father Winter's Baby
Flower Shop Seasons/Get to Work Retail