Sims 3: How to Install Mods

Installing mods in The Sims 3 is a great way to enhance your gameplay with new features, bug fixes, and custom content. Whether you’re looking to add new hairstyles, tweak gameplay mechanics, or install quality-of-life improvements, this guide walks you through the full process of safely installing mods step-by-step.

Step 1: Set Up the Mods Folder

Before installing any mods, you need to create the correct file structure.

  1. Go to Documents > Electronic Arts > The Sims 3.
  2. Create a new folder called Mods (if it doesn’t already exist).
  3. Inside the Mods folder, create two subfolders: Packages and Overrides.
  4. Download a file called Resource.cfg. You can find this by downloading the Framework Setup from trusted sources like Mod The Sims.
  5. Place the Resource.cfg file directly inside the Mods folder (not in a subfolder).

This setup tells the game where to load custom content from.

Step 2: Download and Install Mods

Most Sims 3 mods come in .package format. Here’s how to add them to your game:

  1. Download the mod you want from a trusted site like Mod The Sims or NRaas.
  2. If the mod is in a compressed file like .zip or .rar, extract it using a program like WinRAR or 7-Zip.
  3. Move the .package file into Documents > Electronic Arts > The Sims 3 > Mods > Packages.

You can install as many mods as you like, but make sure they don’t conflict with each other.

Step 3: Test the Mods

To confirm everything is working:

  1. Launch The Sims 3.
  2. If you installed a test mod like NoIntro.package, the EA intro video should be skipped.
  3. If the mod affects gameplay, create a test save and check for changes.

Tips for Modding Safely

  • Always back up your saves before adding or removing mods.
  • Keep your mods organized with labeled folders in the Packages directory.
  • Delete the game’s cache files (such as scriptCache.package) after changing mods to avoid issues.
  • Make sure mods are compatible with your game version and any expansion packs you’re using.

For advanced modding like career tuning or story progression, check out Sims 3: How to Cheat Skills and other modded gameplay guides.

With this setup, you’re ready to explore a whole new level of customization in The Sims 3.