10 known build challenges and who made them
| Challenge | The rule | Creator or source |
|---|---|---|
| Shell Challenge | One builder shares bare outer walls. You finish the house without changing them. | Lilsimsie's Shell Build Challenge, March 2019 |
| Every Room Is a Different Pack | Every room uses items from a different pack. | Vixella's video, April 2020. Fanlore credits her with the format |
| Black and White | Set your monitor to greyscale, build without seeing any color, then switch color back on. | James Turner, January 2018 |
| Inverted Colour | The same idea with your monitor's colors inverted. | James Turner, January 2018 |
| No Mistakes | Every click is final. Nothing you place can be undone, deleted or moved. | Idea by Simply Simlie, shown in UrbanSims' Make No Mistake video, August 2017 |
| Solid Color | Walls, doors, windows and furniture all in one color. Plants, terrain paint and rocks are free, and the mailbox is exempt. No CC. | An older Sims Community forum challenge. Rules reposted by chealsycat on EA Forums, 2021 |
| Tiny Home | Use the Tiny Home Residential lot type from Tiny Living Stuff: 100 tiles at most, with smaller tiers at 64 and 32 tiles. | EA's Tiny Living announcement, January 2020. Tier sizes as reported by Sims Community |
| Random brief | A generator rolls the building type, floors, lot size, owners, what they love and fear, a must-have object and a budget. | James Turner's Random Challenge Generator. Plumbella shared her own generator in June 2023 |
| Block Party | Flatten Willow Creek or Oasis Springs, or start in empty Newcrest, and rebuild the whole world: two starter homes at §20,000 or less, a park, four more community lots and one mansion worth §200,000 or more. | simslegacychallenge.com |
| One-Tile Box | Half build, half gameplay. A Sim starts walled into a 1×1 room with no money and has to earn every extra tile and object. | Community challenge. SoulGal7's 2024 thread says it may go back to The Sims 1 |
Shell Challenge rules and hashtags
Lilsimsie's 2019 Shell Build Challenge came with five written rules:
- Keep every existing wall and add no new exterior walls. Changing the wall height is allowed.
- Add any interior walls you want.
- Fences, foundations and outdoor flooring are allowed.
- No custom content.
- You may move the shell around the lot or onto another lot.
Entries went on the Gallery with #SimsieChallenge. Other hosts use their own tags: #JTRandomBuild for James Turner's generator and #Sims4BlockParty for Block Party lots. To run your own, post a shell or a brief, name a hashtag, and say whether packs and CC are allowed.
10 new build challenge ideas
These ten are our own ideas, not established community challenges. Change anything you like.
- Price ladder: every room must cost double the one before it, starting at §500.
- Third swatch: use only the third color swatch of every object, wall and floor.
- Catalog roulette: for each object, scroll the catalog with your eyes closed and place whatever you click.
- No right angles: every exterior wall has to be diagonal.
- Upside-down house: bedrooms in the basement, kitchen and living room on the top floor.
- Mirror duplex: two mirrored floor plans, one side in warm colors only, the other in cool colors only.
- Client swap: write a three-line brief for a friend and build the one they write for you.
- Memory build: rebuild your childhood home from memory in 30 minutes. No photos.
- Rescue job: pick a premade house in Willow Creek, keep every exterior wall and renovate it for §10,000.
- Roof first: place the whole roof, then build the walls to fit under it.
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Generators, budgets and base game picks
- James Turner's generator has more modes than the random build: Tiny Home, Single Pack Build and Starter Home among them. You untick the packs you don't own first.
- Tiny homes pair well with a budget. Block Party's starter-home limit of §20,000 is a good one to borrow.
- Gameplay challenges with build limits: the Apocalypse Challenge locks you into an 8×8 square until a Sim tops the Villain career.
- No packs? The Shell, Black and White, No Mistakes, Solid Color and Block Party rules don't ask for any. More on the base game challenges page and the main list.
FAQ
What is the Shell Challenge in The Sims 4?
One builder uploads the bare outer walls of a house and everyone else finishes it without changing those walls. Lilsimsie's March 2019 challenge used the hashtag #SimsieChallenge and banned custom content.
Do Sims 4 build challenges need packs or custom content?
Most don't. The Tiny Home lot type needs Tiny Living Stuff, and Every Room Is a Different Pack needs one pack per room. Lilsimsie's shell rules and the Solid Color rules ban custom content. Block Party allows it but warns that it makes lots harder for others to use.
Is there a Sims 4 build challenge generator?
Yes. James Turner's Random Challenge Generator rolls a full brief with a budget, and Plumbella shared a generator of her own in a June 2023 video.