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Build & Create-a-Sim

The Family Tree CAS

Before a single day is played, you build a whole family that *feels* real — grandparents, parents, kids — each generation visibly descended from the last.

✦ Set your packs to confirm this works for you
Type
Create-a-Sim
Difficulty
Hard
Length
One CAS session
Best for
Storytellers who love believable genetics

Difficulty (1–5 plumbobs): 1 Casual · 2 Moderate · 3 Hard · 4 Brutal · 5 Extreme

📖 The story

Before a single day is played, you build a whole family that *feels* real — grandparents, parents, kids — each generation visibly descended from the last. It's storytelling in the genetics, all done in Create-a-Sim.

💝 The goal

Build a believable **three-generation family** in CAS, with realistic genetics and resemblance between relatives.

🎀 Packs required

✓ Base game only

Packs recommended

None

🏡 Setup

LotAny (this is a CAS exercise)
FundsN/A
AgingAny
SimsA full three-generation family

🚀 Getting started

  • Start with the grandparents, then use CAS's "inherit/genetics" tools to build descendants who genuinely resemble them.
  • In CAS, build elders first, then use **Use Parent's/Inherit** genetics to create children.

⌨️ Cheats to type

testingcheats true

📋 General rules

  • Each generation must visibly descend from the last.
  • Use CAS genetics tools rather than building each Sim from scratch.
  • The whole family tree is coherent before play begins.

✨ Specific rules

  • Create grandparents, their children, and grandchildren.
  • Resemblance must be evident across generations.
  • Set up the in-game family relationships to match the tree.

✅ What you can do

  • Use CAS genetics tools to inherit features and build resemblance across three generations.

⛔ What you can't do

  • Relatives must believably resemble one another — no wildly unrelated faces.
  • Build the tree deliberately, generation by generation.

🎯 Objectives — complete the checklist

0 of 5 done · 0%

🎮 If you don't own the packs

Fully base-game.

💡 Strategy tips

  • Use CAS's "inherit features from parents" to blend two Sims into a convincing child, then nudge by hand.
  • Carry signature features (a nose, eye shape, hair colour) down the line for visible family resemblance.
  • Give each Sim an age-appropriate style so the generations read clearly.

💕 Milestones — track your progress

0 of 5 done · 0%

🔥 Want it harder?

  • Extend to **five** generations with consistent resemblance throughout.
  • Include believable in-laws who *don't* share the family look.

🎭 Variations

A "spot the relative" version designed so anyone can guess who's related to whom. ---

Original — Plumbob, a CAS-genetics storytelling format. · Last tested: Patch 1.108 — Feb 2026