Download the Boost Pack and accelerate your GRID Autosport progression in career mode and online. Gain a boost of approximately 50% more XP in career mode and around 50% more XP, Vehicle XP and in-game Cash when you race online.
Open the Steam client, login and locate the Games tab on the top menu. Click this and then select “Activate a Product on Steam…”
Enter your unique code that's displayed on the 'Orders' page of CDKeys.com and follow the prompts to activate.
Your game is now viewable in the “Library” tab and is available to download/install when you’re ready. You can find additional support for the Steam client here: https://help.steampowered.com/en/wizard/HelpWithSteam