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Build & Create-a-Sim

Genetics Roulette

You don't get to design these kids.

โœฆ Set your packs to confirm this works for you
Type
Create-a-Sim ยท Legacy
Difficulty
Moderate
Length
Multi-generation
Best for
Players who love unpredictable genetics

Difficulty (1โ€“5 plumbobs): 1 Casual ยท 2 Moderate ยท 3 Hard ยท 4 Brutal ยท 5 Extreme

๐Ÿ“– The story

You don't get to design these kids. Two completely randomised strangers fall in love, and whatever the genetic dice throw together โ€” the nose, the temper, the unfortunate hair โ€” that's your household now. No take-backs.

๐Ÿ’ The goal

Fully **randomise two founders** in CAS, pair them, and play their genetically-inherited children with no cosmetic edits.

๐ŸŽ€ Packs required

โœ“ Base game only

Packs recommended

None

๐Ÿก Setup

LotAny family home
FundsDefault
AgingOn, normal
SimsTwo fully randomised founders

๐Ÿš€ Getting started

  • In CAS, use the randomise button on two Sims until they're completely random, then move them in together.
  • Randomise both founders fully in CAS; make no manual edits.

โŒจ๏ธ Cheats to type

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๐Ÿ“‹ General rules

  • Founders are 100% randomised โ€” no tweaking their looks or traits.
  • Children are played exactly as their genetics produce them.
  • No editing a child's appearance in CAS, ever.

โœจ Specific rules

  • Pair the two founders and have children.
  • Accept whatever the kids inherit โ€” looks and (where applicable) traits.
  • Continue the bloodline, embracing the genetic chaos.

โœ… What you can do

  • Use CAS randomise on both founders; play whatever children the genetics produce.
  • Use `bb.moveobjects`.

โ›” What you can't do

  • No cosmetic edits to the founders or children after randomising.
  • Play the genetics you're dealt.

๐ŸŽฏ Objectives โ€” complete the checklist

0 of 5 done ยท 0%

๐ŸŽฎ If you don't own the packs

Fully base-game.

๐Ÿ’ก Strategy tips

  • Resist the urge to "fix" an unfortunate child โ€” the unpredictability *is* the challenge.
  • Let inherited features inspire each Sim's story and style choices (you can dress them, just not re-sculpt them).
  • Pair children with other random Sims to keep the gene pool wild.

๐Ÿ’• Milestones โ€” track your progress

0 of 5 done ยท 0%

๐Ÿ”ฅ Want it harder?

  • Randomise every spouse who marries in, too โ€” no hand-picked partners ever.
  • Run it as a full ten-generation legacy of pure randomness.

๐ŸŽญ Variations

A "roll for everything" version where traits, aspirations and careers are also randomised each generation. ---

A popular community CAS-genetics format. ยท Last tested: Patch 1.108 โ€” Feb 2026