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.
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
Packs recommended
🏡 Setup
🚀 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