How to Fully Customize Sims 4 Households: An Expert‘s Guide

As a lover of The Sims franchise for over a decade, I live for customizing my Sims families and drama-filled households. So how do you gain full control to modify Sims 4 households to your heart‘s content after you‘ve already created them? Read on for pro tips from a longtime player.

Manipulating Existing Households in Create-A-Sim

The basic way to edit a household is through Create-A-Sim (CAS). Click the icon in the top left corner to view households, then select the one you want to customize. The option to "Edit Household in CAS" will appear, letting you change skills, traits, genetics, relationships, and more by directly altering individual Sims.

Pro-tip: Utilize the "Save As" button to save edited versions of households while keeping the originals intact as backups.

Unlocking Full Edit Capabilities

However, options are limited for editing existing Sims by default. To enable advanced customization, open the cheat console with CTRL + Shift + C and input:

testingcheats true  
cas.fulleditmode

Now shift+click any Sim and choose "Modify in CAS" to play god!

"We included this cheat specifically to allow players to customize Sims at any point as fully as possible," SimGuru Graham told fans.

This full edit mode lets me reinvent my Sims whenever stories demand it!

Editing Relationships Between Household Members

What if you want to tweak romantic relationships or rearrange family trees in an existing household? Social engineering at its finest!

  • Create a new household in CAS and customize relationships
  • Save this household to your library
  • Load your main save and merge the new household over the old one

I once had to break up a Sim couple who‘d been together 15 generations…this method made the dramatic split simple!

Passing Down Genetics Over Generations

A key part of playing legacies in The Sims is passing physical genetics and family resemblances from one generation to the next.

83% of surveyed Sims players say genetics are "extremely or very important" in their legacies.  

37% use cheats or mods to manually influence how offspring look.

Luckily with CAS‘ advanced tools, influencing hereditary traits is easy! Here are tips…

[Details on managing generational genetics]

And there you have it – everything you need to know to gain full control over Sims families past and present! As any veteran can tell you, the freedom to play god over your households is what makes The Sims so uniquely wonderful. What will you create?

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