Activation via the Rockstar Games Launcher Application 

1. Open your Rockstar Games Launcher and sign into your existing account. Or create one. 
   
2. Click on the icon located on the top-right corner of the page and select the REDEEM CODE button. 
   
   
   
3. The Rockstar Code activation window will pop open. Enter the activation code into the assigned box and select the CHECK button.  
   
   

Activation via the Website 

1. Sign in to the Rockstar Social Club account (here) 
   
   
   
2. Select the Use Rockstar Code button of any product (they all ultimately lead to the same window) 
   
   
   
3. Enter your activation code in the designated area and click on the Activate button.