How to activate Rockstar CD key?Follow these simple steps to activate your new game on Rockstar Social Club
Step 1: Download and install Rockstar Social Club application on your PC. The link to official download page can be found here.
Step 2: Launch the Rockstar client. Login to your account if you already have one or register a new account.
Step 3: Click on the your profile icon in the top-right side of the application and choose "REDEEM CODE"
Step 4: Enter the cd key that you would like to activate on Rockstar and press "CHECK"
That's it! Your game is now activated and you can find it in your Rockstar library. Head over there to download and play your game!