1. Visit http://www.thesims3.com and create an account if you don’t have one. If you already have an account, go to step 2. For those with an Origin account, use the same email and password to register at http://www.thesims3.com.
2. Once registered, log in to your account to enter your game codes.
3. Click on the My Page tab.
4. Go to the My Account tab.
5. Select Redeem Code and enter the 16-character code, then click Redeem.
6. Type in the product code for the expansion or stuff pack.
7. Click the green Register button to complete the process.
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